I am running a 27" 3840 x 2160 monitor right now, which I bought used. Scaling seems to be pretty good right now. That's quite important because pixel density has made the UI of many applications in Windows and Linux scaling less than ideal. Luckily this is not an issue with this game. Good job to the developers! Here is an image: Click the thumbnail for a full sized version. It is just a new game, but it should give you an idea.
