PC Perspective is taking a look at how far AMD and NVIDIA are with the development of their graphics card drivers for Windows 7, you can read the report over here. The reporter concludes Windows 7 is shaping up to be a more pleasant transition than Vista:
As I mentioned on the one of the first pages of this article (that was a LOONG time ago...) the only fair comparison for looking at pure Vista versus Windows 7 gaming results is with AMD's graphics cards and their unified Catalyst 9.3 driver that supports both operating systems. To that end, the AMD situation showed us that users will likely see very modest performance gains moving over from a Windows Vista gaming system to a Windows 7-based PC. Considering how early we are into the life of Windows 7 (it is still in beta after all), this is a very welcome shift from how things worked before Windows Vista's release. In fact, there are still some gamers that are likely refusing to move to Vista because of apparent performance degradation compared to Windows XP. (Those differences are long gone now, btw.)
In January of 2007 I posted an article that looked at performance of gaming on a beta version of Windows Vista and the results were not very good. I know that all of us, the game developers, driver programmers, hardware vendors and enthusiast community are glad to see that Windows 7 looks to be shaping up as a much more pleasant transition.