How much ppi is too much? The average person can't tell

My main computer is 276 ppi. I don't think I'd need any more than that.

>>55843296
>How much ppi is too much?
Whatever is more than the pixel density that is unresolvable for someone with 20/20 vision at the approximate distance the display will be viewed at.

The problem is, the distance a person views a screen from varies.
I would like to do a comparison of 4K and 1080p at the 12.5" scale, but I'm not rich.
Maybe I could get some shill on youtube to do it.

my phone has 534 PPI. it's really nice at times but I don't think I need anything more than 1080p considering the extra resolution that I barely notice takes extra processing speed and isn't as power efficient.

Im posting this on a 2012 IPod touch. It doesnt matter how close I get to the screen I cant see any pixels

>>55843296
If there is a single person who can perceive the difference then it is not too much. I know I'm not average, because I can clearly see better than 20/15 which was the cutoff when I was measured by the school, but I can clearly see the pixels in my blackberry passport which is 4.5in 1440x1440

>>55843391
That 'retina' buzzword stuff was pretty well engineered. The rest of us just have to put up with standard screen resolutions.

>>55843344
This