I'm not really interested in the software of a pc, so haven't been following it, but... Vista will flop from what I read in this thread. No one is going to buy it for their system, because the average person isn't rich enough to buy a HDCP monitor, Vista and a top of the range card at the same time that is really interested in a PC that they will get worse performance on, then they would with xp.
It will be owned by spoiled rich kids.