My laptop has a 4K screen, but I switch to an external 27" QHD (2560x1440) display when I'm at my desk and boy ... I used to like that external monitor. Now all I can see, all I notice, is how much worse and more pixelated text looks on it than when I'm reading on the laptop's screen. It practically looks blurry!

So yeah, nobody needs a 4K display. But I would think most people don't know what they're missing. (: