Use LG UltraFine 4K with PS4 Pro (And probably Xbox One X)

I see no reason for it not to work is just a monitor, as long as you have the proper adaptor you will be fine.

(4k in a 21.5" display is a bit too much thou, there is no point in processing extra pixels that you can barely see, I would suggest 24" or 27" at least)

edit

there is some discussion here:https://www.reddit.com/r/apple/comments/5fan7e/lg_ultrafine_4k_compatible_with_windows_10_on_a_pc/

Basically its a usb type c monitor. even being designer thinking in Apple products it still has to respect the protocol. You just need to make sure to get the right cable and the right adaptor. (not every cable or adaptor supports 4k)

Plus apparently some feature such as the light sensor seem not to work in windows 10 because there are no drivers for it.