yeah it will be a 64 bit os i think, coz isnt there already a 64 bit xp?
also directx 10 will be exclusively for vista. so it will be interesting to see how that pans out. (forcing gamers to upgrade they’re version of windows to play games, or forcing developers to continue to use dx9 for games). although i will say the initial docs and presentations for vista and dx10 are actually pretty impressive. the os is going to be very much be centred around the GPU.