The fact is, most XP users are scared or too ignorant to move to Vista. I've asked many people (some who have never tried Vista) and most of those who regularly use XP will say they hate or don't like Vista. That's coming from people who have never even tried it! Many said they have read about it or heard about it from a friend who hates it. That's ignorance.
I have tried it and I don't like it, although I must confess it "looks good". B.t.w. why going from XP to Vista when you can move to Linux? I choose to keep my hardware and Linux don't forces me to upgrade either. I'm actually running Open Office 3.0.1 on my old powerbook (using Linux) which was produced 10 years ago. Impressed?
That's not really the point. Sure people could move to Linux, but it's a different game. Yes, most people can use Linux, but when it comes to gaming, Windows wins. But for everything else, there is Linux. It's always a possibility. For the majority of the users, however, don't want to or need to learn something new. Windows is Windows, it doesn't change shape... besides where things are located sometimes. Vista is good, especially now that SP2 is out, and XP is just as good with SP3, but doesn't have the looks. Windows 7 is all good too, but like someone said in another thread, it doesn't matter the choice of OS as long as the hardware is good.
I will most likely be running when 7 when it is released, maybe a few months after.