RemoteFX is a new set of technologies introduced in Windows Server 2008 R2 SP1 including:
  • Advanced screen codecs to provide a great experience from any client that supports the RemoteFX decode
  • Virtualized GPU support that allows virtualized guests to access physical GPU resources on the host.  This provides greater app compat (as now DX applications are supported in a VDI environment)
  • Generic (Isochronous) USB remoting for RDVH (VDI) scenarios. 

More info here: http://blogs.technet.com/b/virtualization/archive/2010/03/18/explaining-microsoft-remotefx.aspx

RemoteFX is best known as a VDI feature, but it's also available for sessions. To learn more about the RemoteFX experience on RD Session Host WS08 R2 SP, see this blog entry: http://blogs.msdn.com/b/rds/archive/2011/03/25/q-amp-a-microsoft-remotefx-and-remote-desktop-session-host-servers.aspx

Microsoft VDI became licensing-aware in SP!. See this blog entry to learn how to configure licensing settings using PowerShell: http://blogs.msdn.com/b/rds/archive/2010/12/15/configuring-remote-desktop-licensing-settings-on-a-remote-desktop-virtualization-host-server.aspx. For more information about license management for VDI, see http://blogs.msdn.com/b/rds/archive/2010/12/05/centralized-licensing-management-for-microsoft-vdi.aspx.

Want to try out RemoteFX? See this blog entry for a list of all our documents: http://blogs.msdn.com/b/rds/archive/2011/02/25/documentation-available-for-microsoft-remotefx.aspx