Originally Posted by Lemur
To the best of my knowledge, DX10 is the only advantage of Vista over XP when it comes to gaming. Hmm, also there's the fact that Microsoft has released a couple of DX9 games for Vista only, but that's not a very compelling reason. The games are not that spectacular, and fans have written workarounds that allow you to play them on XP systems.
XP is stable and mature right now. Vista will issue Service Pack 1 sometime in the beginning of '08, and Service Pack 2 roughly a year after that. The advantage of getting Vista now is that you don't have to fret about when to migrate to Vista.