well i am very versed in computers and i can say that at least for me and my (2 gigs processor dual, 2 gigs ram, ) vista run very good, the only problme i got is that i am unable to play starcraft (well i can play it in my ubuntu partition with a xp in a virtualbox) , but aside that everthing works quite good, and its as usable and xp, but i have to say that i really dont see a great useful change when compared to xp
so i dont see a reason to downgrade to xp when buying a new computer (maybe performance, but i use in my work Firefox with a lot of tabs, skype, msn , pidgin , Fireworks, Photoshop, Notepad++, Openoffice writer, winamp and Thunderbird at the same time and it never slowdown. so....)
Windows 7 maybe it can replace windows xp, there a lot of positive reviews and it have a good chance that people arent intereste in downgrade to xp when buying a new computer.







