At average living room distances, 8K displays offer "no distinguishable benefit" over 4K ones, writes Nicola Davis at The Guardian. Moreover, even 4K ones offer "no noticeable beneit over a similarly-sized 2K screen."

In other words, there is no tangible difference when it comes to how sharp an image appears to our eyes.

Dr Maliha Ashraf, the first author of the study from the University of Cambridge: "At a certain viewing distance, it doesn't matter how many pixels you add. It's just, I suppose, wasteful because your eye can't really detect it." 10

300 pixels per inch is often given as a benchmark for what most people's eyes can resolve, but that's for screens a foot away. The chart below shows that, for most people, there's no point upgrading to 8k unless you're looking at an 80" dis

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