I'm actually looking forward to seeing what windows 7 will be like once it's released.  Vista was epic fail (ok, you have to admit, there are way more vista haters then lovers) so wonder if windows 7 will do better. I have no goals to upgrade to either vista or 7 now, but that could easily change over the next few years, that's if I don't end up going Linux.
MS is sneaky though, they pushed and pushed to get people on vista, only for a new OS to be coming out soon anyway, then they'll push for that one too.  But guess business is business eh. Have to make profit, it's the whole point.
And sticking to topic of theme, I actually don't mind the vista/7 theme, though it would be nice to see something different just to avoid the confusion especially with computer newbs calling tech support. Then again, some people can't tell the difference between Dell 2000 (that's an OS?) and Windows XP, so a theme wont fix noobs.