I have just upgraded my 3 21" HD monitors (getting close to 6/7 years old) to a couple of 27" 4K monitors from LG. Just played ED and it is AMAZING in 4K! My GTX1080 copes quite well with a couple of settings tweaked from "high" hitting a near constant 60FPS (max of the monitors).
I have to admit, the game does an excellent job expanding out into such high resolutions. The HUD is crystal clear and the textures scale really well.