Vista gaming performance = XP - 10->15%
Microsoft is reportedly telling it's gaming industry associates that games will run 10-15% slower on their new operating system due to the new GUI implemented.
This is inline with my own experiences with the operating system.
Microsoft are already going to have a hard timeselling Vista to the Generic Gamer.
Everywhere I turn, I see misinformation about how DRM will effect it, or how 'evil' it is (Apple virus marketting perhaps? ;)) for copying xyz feature from xyz company (when Microsoft actually came up with it, just they were beaten to the punch), etc etc.
This won't help matters, and until performance is 5->10% worse than XP (which could happen by the time Vista is released to the general public), I doubt many gamers - informed or not about the common mistruths - will want to convert.
(Via Neowin)