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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.

The calculator on rtings.com tells a completely difference story. I need a 75" at 3m to benefit from 4k.