Today Microsoft made available Service Pack 1 for Windows 7 and Server 2008 R2 via its Windows Update and download center sites. SP1 includes the new RemoteFX feature which delivers Direct3D acceleration and on the server side SP1 includes Dynamic Memory. This essentially allows on-the-fly adjustment of memory allocation for virtual machines being hosted on Hyper-V.
http://windows.microsoft.com/en-CA/windows/downloads/service-packs
