Can’t believe I had to scroll down this far to find this:

Here’s the gut-punch for the typical living room, however. If you’re sitting the average 2.5 meters away from a 44-inch set, a simple Quad HD (QHD) display already packs more detail than your eye can possibly distinguish. The scientists made it crystal clear: once your setup hits that threshold, any further increase in pixel count, like moving from 4K to an 8K model of the same size and distance, hits the law of diminishing returns because your eye simply can’t detect the added detail.

On a computer monitor, it’s easily apparent because you’re not sitting 2+ m away, and in a living room, 44" is tiny, by recent standards.