This article goes over RemoteFX and RDSH for 2008 R2 SP1, but nothing is discussed in regards to 2012 R2 Hyper-V HOSTs for the virtualized RDSH server.
http://blogs.msdn.com/b/rds/archive/2011/03/25/q-amp-a-microsoft-remotefx-and-remote-desktop-session-host-servers.aspx
My goal is to use a 2012 R2 Hyper-V HOST server to provide RemoteFX vGPU performance to a 2008 R2 SP1 RDSH server. Is this possible? If not, are there any solutions that can provide graphics performance benefits to an RDSH server? If so, are there limitations? What are the benefits?