With Windows Server 2008 R2 SP1 we can expect “dynamic memory” and “RemoteFX” amongst other features.
Read more here:
http://www.microsoft.com/Presspass/press/2010/mar10/03-18DesktopVirtPR.mspx
Read the complete post at http://owsug.ca/blogs/brad/archive/2010/03/18/New-Virtualization-features-have-been-announced-in-today_1920_s-MS-Press-Pass_2E00_.aspx