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Excellent and helpful article - thanks!

I derived the formula below based on the 3 examples in the article (40, 50 and 60 inch). The common factor of 135 actually varied between 135 and 144, due (I assume) to rounding up to full or half feet in the source numbers, so just use a number in the above range (noting that a smaller value gives a more conservative estimate).

In theory, and if I read the article correctly, this should give you the minimum distance you need to be from the display to appreciate the resolution (any further away and you could consider a lower res).

Distance (feet) = Size (inches) * 135 / Lines of Resolution

e.g. for a 37" display

D=37*135/1080= about 4.5 feet

I've checked this for my own purposes, but would appreciate someone rechecking the calcs, and reposting if you find that I am incorrect.