I remember there was far more resistance to upgrade when XP came out. But then XP was Microsoft's first consumer OS based on NT - so to fair to XP it did have a big disadvantage. Vista has been pretty good on the whole. Even a service pack for XP (SP2) got more resistance than Vista has as a whole I think.
Vista is a great OS the only downer for me is the god awful mess that they call the "Control Panel". What on earth did they do to it?! Also there are still a few compatibility problems - like my HP 1005 Laserjet *still* doesn't have a driver
But luckily I'm intelligent enough to not blindly blame those type of things on Microsoft. Indeed Microsoft provide me with a viable workaround that is Virtual PC 2007 
Aero Glass is just excellent and pretty much is everything I expected it to be (and no I'm not talking about the nicety effects - couldn't care less about those, but the actual performance and artifact-free desktop). And the best thing is... it is going to get better.
Vista is a great OS the only downer for me is the god awful mess that they call the "Control Panel". What on earth did they do to it?! Also there are still a few compatibility problems - like my HP 1005 Laserjet *still* doesn't have a driver


Aero Glass is just excellent and pretty much is everything I expected it to be (and no I'm not talking about the nicety effects - couldn't care less about those, but the actual performance and artifact-free desktop). And the best thing is... it is going to get better.