http://gizmodo.com/5226696/windows-7-release-candidate-1s-best-surprise-new-features
XP Mode runs each XP app in a separate API, i.e. integrated virtual desktop.
They're making it compatible without having to keep all the old problems in the OS
thumbs up, this is a great idea
now all they need to do is make unsigned Visual Styles allowed by default, and I'll be all over 7.
This is what Mac OS X did when it first came out. It shipped with OS 9 and featured a full virtual mode. Very useful, it is, though there's a big hit to performance.
Maybe they'll finally clean up the rough edges on it :/