Eh, it is sort of bad actually. 27 inch at 1080 and you can start to see the pixels again. Doesn't really matter for media consumption or games, but reading text on it can be annoying, and you will notice it in Windows.
If you can afford it and run it, look into 2560x1440p
Still not quite sure when they will catch up with Linux, Mac, and Android when it comes to scaling. Basically have to use the Windows 10 preview if you want 4K support.