Well Vista may be the best thing (some say the only good thing) to come out of Microsoft, or it may be a huge letdown for gamers.
It's sort of a will they won't they situation at the moment.
DX10, Halo2, 64-bitonly - these are all issues still floating around on the internet with no direct answers.
But one thing that does concern me is the talk about the specs needed to simply RUN the OS, if what's talked about is what you need to run it imagine what you need to run games on top of that - would surely cause some major lag compared to XP running in the background.
I do hope it's all it's cracked up to be, but as always with Microsoft I have my doubts. I guess we'll just have to wait and see what happens.