Seriously, articles like this are just clickbait.
They also ignore all sorts of usecases.
Like for a desktop monitor, 4k is extremely noticeable vs even 1440P or 1080P/2k
Unless you're sitting very far away, the sharpness of text and therefore amount of readable information you can fit on the screen changes dramatically.
Oh absolutely, but even TVs are used in different contexts.
Like the thing about text applies to console games, applies to menus, applies to certain types of high detail media etc.