Changing DPI settings still screws up various applications on Windows 7 (fonts on various UI elements don't scale consistently, e.g. Visual Studio 2010 is messed up, games are usually completely broken even modern ones like Starcraft II, etc.) and overall make the system very frustrating to use (especially annoying since I have a pair of IBM T221s capable of 3840x2400). That being said it's still worthwhile when I'm in e.g. Lightroom.