I probably won't buy Vista until the cheap Student Version comes out (I can buy XP legally at school for $30, full non-upgrade version).
Most of the features I was most interested in for Vista have been scrapped or delayed. However, I am very happy that Microsoft is learning from Linux. While iago is correct in saying that very little of Vista is ingenuitive, Its a considerable improvement and if they can speed up their development process, the postponed features will probably make it a very nice OS.