Why your next TV must be a 4K

[jlb2]

Originally Posted by walterbeers

I've read that a 4K image is actually sharper than what our own eyes can perceive.

Oh no, far from it. It doesn't really make sense to say that your eyes are equivalent to a X megapixel camera - their resolution is very high at the centre and much lower on the edges so it's comparing apples to oranges - but since your eyes are constantly moving to reconstruct a full-resolution image, you can consider that your vision is sort of like a camera that would have the pixel density of the centre of your retina. A quick calculation (available here) gives a resolution in the hundreds of megapixels, while 4K only achieves a miserable 8.3 megapixels. It will roughly take a 50-fold improvement in TV resolution to equal your bare eyes.