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Pemalite said:
Lawlight said:

This diagram doesn't seem right. You can see the difference between 720p and 1080p on a 15 inch screen at 3m away?

It is actually correct.

However it's more of a guideline.
Human vision can exceed 20/20 for example... What it's trying to say is that you get diminishing returns after those points.

Guess my vision doesn't. Simple test on my laptop 15.4" 1080p laptop screen. I can tell that 1080p is sharper than 540p at 1m distance. Can't tell the difference at 2m, let alone 3m.

540p created by downsampling to 960x270, then pixels quadrupled back to 1920x540.
Top left, bottom right are at full res, Bottom left and top right are at half res. (Obviously open full screen, it all looks identical at 960x540)

But true the old chart is too conservative, this new one is a bit over the top.