Its nothing new, its more like the Rollup was for windows 2000
Includes all post SP2 hotffizxes and security updates. It DOES NOT install .NET, WMP11, IE7 (but has patches for them if you do have them installed). Only new things are tyo do with networking, to make it vista/server 2008 friendly.
Does seem to be stable though and windows seems faster?? dont know why...
Its for xp x86 only (not x86_64 pro !, thats based on server 2003)
a nice feature is that a product key is no longer requierd at install time (ms ran out)
real machine but not my college one (just the games pc) . im not bothered if i have to reinstall the os (but you shouldnt have to, the RC is uninstallable and ms say you should be able to uninstall and install the Gold Master when its out)