I’m old enough to remember when scientists confidently assured us that 800×600 resolution was all that was needed and the human eye couldn’t really perceive any more detail than that.
That was around 1994 or so. Can you imagine living with 800×600 now? Looks like garbage, right? But that was common “knowledge” back then. Common “knowledge” these days is that no one can possibly distinguish between 1080p and 4K. Sure, buddy. Heard that story before. Just as much an absurd lie this time too.
Probably the upper human vision limit of being able to notice any difference under ideal conditions is 32K on a 27″ monitor. Many people, however, truly wouldn’t be able to distinguish anything at or above about 8K.
And those are the actual limits of human vision, as opposed to the clown pseudoscience a lot of faux-scientists seem to pull out of their ass every few years.