To be fair the difference in bitrate between 1080/4k is probably (in my opinion)...

timpattinson on Feb 11, 2021 | parent | context | favorite | on: TV Size-to-Distance Calculator and Science

To be fair the difference in bitrate between 1080/4k is probably (in my opinion) a bigger difference than the pixel count, uncompressed 1080 looks pretty damn good.

but yeah the "the eye can't see >20fps" or a certain dpi is definitely BS.