This is probably how MS plans to run their apps 15% faster than WinXP but you need a hell of a lot of RAM. The most basic version of vista allows 0-8 gigs of RAM. and the Ultimate allows +120 gigs of RAM, can someone tell me where the average guy fits 120 gigs of RAM in his machine?
I don't think to many users that microsoft is marketing to will have 32 bit systems by then at least under 50% will be 32 bit.
Also it better be more than 2-4 gig for the normal. Think about it RAM for the system is at a minimum 512 that means you would at least want a gig for the OS. Then you want a gig for your apps. Then you want yet another 2-3 gigs for the new features Vista will implement for faster app loading. I say a minimum of 5 gig would be great on the Ultimate Edition of Vista (currently the only version that uses RAM to incease speed if I"m not mistaken).