I have tried hdmi 2.0 and Displayport from a 32” lg 4K to an Ubuntu 18.04 box with a 1050ti, both seem to work in Linux and windows 10. Displayport to usbc also works at 4kp60 for my MacBook. This was tested with a cheapo monoprice cable and a LG cable.

Edit: code & text is 100% better on a 4K moknitor with proper scaling.