The cloud computing, Windows Azure, System Center and server tools for Windows and more platforms Azure tools for Java and Eclipse are the main topics that Ray Ozzie has mentioned. You can get more details from Noam’s and Alex's blog, he is a great writer :-)
Ray also announced Dallas CTP for discovery, exploring and using data in a new way.
In the bottom line azure is much more mature than the last year, and there are many new tools for hosting applications in the cloud.
Waiting for more information about Windows Phone and Silverlight next.