At normal viewing distance(let's say cinema FOV) most people won't see a difference between 4k and 8k never mind 16k. And it's not that they "don't notice" it'

At normal viewing distance(let's say cinema FOV) most people won't see a difference between 4k and 8k never mind 16k. And it's not that they "don't notice" it's that they physically can't distinguish finer angular separation.