The LG UR78 75″ 4K Ultra HD Smart TV is a sizeable step up for anyone wanting a true big‑screen experience at home. With a 75‑inch LED panel, 4K resolution and LG’s a5 AI Processor 4K Gen6, it’s designed to make films, sport and gaming feel far more immersive than a typical living room TV.
LG is a trusted name in TVs, and this 2023 model leans on the brand’s webOS smart platform, a wide choice of streaming apps, and AI Sound processing to justify its place in a modern home. It’s not a top‑end OLED with every premium spec, but it aims to bring a lot of that feel to a more accessible price point for such a large display.
With an average owner rating of 4.6 out of 5 from over a thousand reviews, it’s clearly hit the mark for many households, especially those upgrading from smaller or older 4K sets.
This TV is ideal for families and film fans who want a proper home‑cinema feel without spending flagship OLED money. The 75‑inch screen dominates a room, so it suits larger lounges, open‑plan spaces or dedicated media rooms where you can sit a sensible distance back.
If you stream most of your entertainment, the built‑in webOS platform with Freeview Play, Netflix, Disney+, Prime Video, Apple TV and more means you can plug it in, connect to Wi‑Fi and get going with virtually every major service. It’s well suited to households that prefer a simple, app‑driven setup rather than extra set‑top boxes.
Gamers who mainly play on consoles will appreciate Auto Low Latency Mode, which reduces input lag for more responsive play. It’s not aimed at ultra‑competitive PC gamers – there’s no 120Hz or variable refresh support like AMD FreeSync or G‑Sync – but for casual to keen console gaming it’s a solid, big‑screen choice.
It also suits buyers who value ease of use over tweaking. Picture presets including Filmmaker Mode and various ISF options offer good out‑of‑the‑box results, while the AI Sound and Clear Voice Pro audio modes help dialogue and effects land clearly without needing a separate sound system straight away.
The sheer size of the 75‑inch 4K Ultra HD screen makes films, sport and boxsets far more immersive than on mid‑sized sets, and the a5 AI Processor 4K Gen6 does a decent job of upscaling HD content so older broadcasts and DVDs still look sharp.
HDR10 Pro and HLG support bring extra punch to supported content on services like Netflix and Disney+, while Filmmaker Mode can strip out aggressive processing and motion smoothing so films look closer to how the director intended.
The webOS smart platform is one of the more polished TV systems around, with a very strong line‑up of UK catch‑up apps and streaming services, plus music apps like Spotify, Apple Music and BBC Sounds. Built‑in Freeview Play also makes it easy to catch up on broadcast TV.
AI Sound (with virtual 5.1 up‑mix) and Clear Voice Pro help the 20W stereo speakers sound fuller than you might expect, especially for day‑to‑day TV and streaming, and eARC support over HDMI makes it straightforward to add a soundbar or AV receiver later.
Connectivity is broadly good for most living rooms, with three HDMI ports, two USBs, Bluetooth for wireless headphones or speakers, and Apple AirPlay 2 and HomeKit support for easy casting and smart‑home integration.
The energy rating of F and quoted annual consumption of around 176 kWh mean this big screen isn’t the most efficient option, so expect running costs to be higher than smaller or more efficient sets – particularly if it’s on for many hours a day.
While HDR10 Pro and HLG are supported, there’s no Dolby Vision, which many streaming services use for their best‑quality HDR streams, and there’s no local dimming on the LED panel. That means contrast and cinematic depth won’t match LG’s own OLEDs or more advanced LED models with local dimming.
Gamers looking for cutting‑edge specs may be disappointed by the lack of AMD FreeSync or Nvidia G‑Sync and the HDMI 2.0 ports capped at 60Hz. It’s perfectly fine for most console gaming, but not aimed at high‑frame‑rate next‑gen enthusiasts.
The standard remote is functional but basic – there’s no smart pointer style control – and the manufacturer warranty is only one year, which feels short for such a large and central piece of home tech. A longer guarantee or extended cover may be worth considering.
Day to day, the LG UR78 is designed to be straightforward. Initial setup is largely guided on‑screen, with an e‑manual and quick start guide included, plus auto channel search and tuning to pick up Freeview channels via the dual aerial inputs. Once online via Wi‑Fi or Ethernet, webOS walks you through logging into your favourite apps.
The 75‑inch panel with slim 6 cm depth looks modern on its leg stand, and the 1344 mm stand width gives a stable footprint as long as your TV unit is wide enough. Cable management is built in, helping keep HDMI and power leads tidy behind the set or when wall‑mounted using a compatible VESA bracket (not included).
Switching between live TV, apps and external devices is handled neatly by webOS, and most people will rely on the preset picture modes – from Vivid and Cinema to dedicated Sports and Game modes – rather than digging into advanced settings. The Ambient Light Sensor can gently adjust brightness for more comfortable viewing in different lighting conditions.
For sound, the 20W stereo speakers get a noticeable lift from AI Sound processing and the virtual 5.1 up‑mix. That makes dialogue clearer and helps fill a mid‑sized to large room reasonably well, although film fans may still want a dedicated soundbar for real surround impact. Bluetooth support also lets you pair wireless headphones for late‑night viewing.
Parents will appreciate the built‑in parental controls and sleep timer, while features like auto power off and energy saving modes help avoid the TV being left on unnecessarily, important given its modest energy rating.
At the heart of this TV is the 75‑inch 4K Ultra HD LED panel, driven by LG’s a5 AI Processor 4K Gen6. That combination delivers crisp detail in native 4K content and handles upscaling from HD and SD sources respectably, so everyday broadcast TV and older streams don’t look soft on such a large canvas.
HDR performance is based on HDR10 Pro and HLG, which adds extra brightness and colour to compatible content. Without local dimming, the set can’t produce the same inky blacks and highlight control as higher‑end models, but for bright rooms and general viewing it remains punchy and engaging, especially in Cinema and Filmmaker modes.
For motion and gaming, the Game picture mode and Auto Low Latency Mode work together to cut input lag, helping controllers feel more responsive. It’s geared towards console players who value a smooth, responsive experience at 60Hz rather than hardcore PC gamers chasing the latest high‑refresh standards.
Audio gets more attention than you might expect from a mid‑range large TV. The 2‑speaker, 20W system is enhanced by AI Sound and Clear Voice Pro, creating a virtual 5.1 surround effect and boosting dialogue. For everyday TV, sport and casual films it’s more than adequate, and eARC means one HDMI port can carry high‑quality audio to a soundbar or AV system when you’re ready to upgrade.
On the smart side, webOS and the LG Content Store offer a very complete app selection for UK viewers, including BBC iPlayer, ITVX, All 4, My5, UKTV, Freeview Play integration and major subscription services like Netflix, Disney+, Prime Video and Apple TV. Music services from Spotify to Apple Music and BBC Sounds are also on board, while Apple AirPlay 2, Miracast screen mirroring and HomeKit support make it easy to share content from phones and tablets.
For a 75‑inch 4K smart TV from a major brand, the LG UR78 sits in a very competitive space. It undercuts premium OLED and high‑end LED models with advanced dimming, while still offering a genuinely cinematic screen size, a capable 4K processor and a mature smart platform.
You are making a few compromises to keep the price sensible: no Dolby Vision, no local dimming, HDMI 2.0 rather than 2.1, and only a one‑year warranty. For many households, those trade‑offs are acceptable, especially if the main goal is a huge, simple‑to‑use screen that handles streaming, live TV and console gaming without fuss.
The excellent owner feedback – a 4.6/5 score from over 1,100 reviews – strongly suggests buyers feel they’ve had good value overall. If you want the biggest screen you can get from a trusted brand without stretching to flagship territory, this model offers a strong balance of size, features and price.
The LG UR78 75″ 4K Ultra HD Smart TV is a compelling option for anyone who wants a truly large screen for films, sport and gaming without tipping into premium‑price territory. Its combination of a 75‑inch 4K panel, solid upscaling, wide app support and helpful audio processing makes it a very capable centrepiece for a modern living room.
It does have limits: HDR support stops at HDR10 Pro and HLG, there’s no local dimming or Dolby Vision, gaming specs are capped at 60Hz, and the energy rating is on the low side. Enthusiasts who want the very best contrast, next‑gen gaming features or rock‑bottom running costs may prefer to spend more on a higher tier.
For most households, though, the strengths outweigh the compromises. If your priority is a huge, easy‑to‑live‑with 4K smart TV from a trusted brand – and you’re happy with solid mid‑range performance rather than cutting‑edge tech – the LG UR78 75″ is a very sound choice.
