OLED, Mini LED, 8K: the labels multiply faster than the benefits. Here is what is worth paying for when you replace your TV in the UK.
TV shopping used to mean choosing a screen size and deciding whether the cabinet would fit through the door. Now the shop wall promises OLED, QLED, Mini LED, 8K and a selection of artificial intelligence apparently employed to improve Tuesday’s weather forecast.
Some upgrades genuinely change what you see. Others cost more while doing very little for the programmes you actually watch. The trick is to start with your room and your viewing habits, not the largest number on the box.
If you enjoy films and dramas in a dim room, OLED is the upgrade most likely to earn its keep. OLED stands for organic light-emitting diode. Each pixel makes its own light and can switch off entirely, so a dark scene can look properly dark rather than charcoal grey. Bright objects also stand out without an illuminated patch surrounding them.
That does not make every OLED a great TV. Which? has found excellent conventional LCD sets too, and picture processing matters: a television still has to make ordinary high-definition broadcasts look convincing. If most of your viewing is daytime news, quiz shows and sport, paying a large premium for perfect blacks may be money spent on a talent your TV rarely gets to demonstrate.
There is also a sensible caveat. Leaving the same channel logo, game menu or other fixed image on an OLED screen for prolonged periods can cause lasting image retention, commonly called burn-in. Modern sets include protective features, but the risk has not vanished. For varied family viewing it need not be a deal-breaker; for a screen left on one news channel all day, an LCD-based TV is the less fussy choice.
Possibly. First, the vocabulary: an LCD TV needs lights behind its picture. A QLED is still an LCD television; its quantum-dot layer helps produce vivid colour. Mini LED describes a backlight made with smaller LEDs, which can control light in separate areas of the screen. Some sets combine both technologies. None of these names, on their own, tells you whether the finished TV is good.
A well-made Mini LED set can deliver punchy brightness and better contrast than a basic backlit model. That makes it particularly appealing where daylight is hard to keep out. Its backlight still controls groups of pixels rather than each pixel individually, though. In a dark film you may notice a faint glow around white subtitles or a small bright object against black. OLED generally has the cleaner result in that situation.
Look beyond the panel label to high dynamic range, or HDR: it gives compatible programmes a wider range between bright and dark parts of the picture. A convincing HDR image depends on the television’s actual brightness and contrast, not merely an HDR logo. Dolby Vision and HDR10+ are formats that can adjust the picture scene by scene; Samsung favours HDR10+ rather than Dolby Vision. Nice to have, but not a reason to buy a mediocre TV over a better one.
The best upgrade is the picture you will notice from your sofa, not the specification you can boast about in the shop.
For almost everyone, 8K is an easy no. It packs four times as many pixels into the screen as 4K, but there is virtually nothing to watch in native 8K. The television can upscale lower-resolution material — estimate the missing pixels — but it cannot turn an HD broadcast into genuine 8K detail. Buy a better 4K screen instead.
A 120Hz screen is a different proposition. Hertz describes how many times the picture can refresh each second. If you play compatible games on a PlayStation 5 or Xbox Series X, a 120Hz TV can show smoother motion; variable refresh rate, or VRR, helps match the screen to a game’s changing frame rate. Check that the HDMI socket you plan to use supports the features, rather than assuming an HDMI 2.1 label settles it. Sony’s own PS5 guidance advises checking the TV’s supported functions.
If your controller has spent more time in a drawer than in your hands, do not pay extra for gaming features. Put that money towards better contrast, sound or a screen size that suits the room.
You can buy a 55-inch TV for around £300, and Which? reviews 55-inch sets below £600, £900 and £1,300. Those are useful shopping brackets, not a rule that the dearer one wins. Its testing finds worthwhile cheaper televisions as well as expensive disappointments. Expect to pay more for a good OLED or a more capable Mini LED model, but compare actual reviews before climbing the range.
Start by measuring from your usual seat to the screen position. Screen size is measured diagonally, not across the cabinet. Which? suggests roughly 3.4 to 3.7 metres for a 55-inch set and about four metres for a 65-inch one, while noting that 4K lets you sit a little closer. Treat those as starting points, not instructions to rearrange the house. Measure the stand or wall space too: a TV with feet at either end may not fit your existing unit.
If your current set is already a good 4K television and still looks fine, you may not need to replace it. A new TV is easier to justify when you are gaining a noticeably larger picture, substantially better contrast or a feature you will use regularly. A launch-year badge is not one of those features.
UK television habits matter more than a showroom demonstration. Check that the model has the catch-up apps you use, including BBC iPlayer, ITVX, Channel 4 and 5, and confirm whether it has Freeview Play if you want its integrated catch-up guide. Do not assume every smart TV has the same services or menus. If you use a satellite dish, check its tuner and Freesat compatibility separately.
Try the remote and programme guide if you can. Can you find subtitles without exploring six menus? Is the picture still good from the chair off to one side? Which? tests viewing angles, ease of use and dialogue clarity because these can spoil an otherwise excellent screen. If speech is your real complaint, compare the TV’s sound before buying and consider a well-reviewed soundbar instead of replacing a perfectly good picture.
Finally, judge a candidate using material you recognise. Showroom footage is designed to make almost anything look glorious. Your next television must also cope with an HD football broadcast, a murky drama and whatever the streaming app serves up after you have given up choosing. That is a rather more demanding audition.
Buy a good 4K TV that fits your room and the programmes you watch. OLED is worth considering for films and dark-room viewing; a well-reviewed Mini LED set may suit a bright room better. Pay for 120Hz gaming features only if you will use them, and leave 8K on the shelf.
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