Steve Balmer talked about some cool things. Here is a list of the new things coming
Scott Guthrie is showing how to build Windows Phone apps using Visual Studio 2010. Very easy.

Demo of new profiling tool availalbe in Visual Studio. Something you can corelate with RedGate's ANTS Profiler.

Don Box, one of the top Microsoft authors and architects, is showing a Azure based app using all kind of user authentications such as MS, Google or Facebook. I met Don Box at PDC 2003. Check out photos from past here:
http://www.c-sharpcorner.com/Photos/Photo.aspx?pid=356&aid=249