Quote Originally Posted by Alansmithee View Post
Believe it or not - at 5 foot, if you go 4K, you want a 55" TV to get the best from it.




The casual viewer has to have something to use a rule of thumb and these are as good as anything. Otherwise you get into the sort of advice for people who spends hundreds of hours discussing which black is quite black enough and normal people just don't care.


The point is, these charts are (by some measures) out by a significant margin - a lot of people can see much finer detail than 1" of arc (subject to other factors), so they are likely to underestimate the value of having a 4k screen for a given size at their habitual viewing distance.

As I said, even just working on Snellen acuity, you can (if I've got my maths right) add upto 50% to the distances (or reduce screen size accordingly). In terms of simple image perception, it's probably quite a bit more than that.