Just an update to this thread, I thought of giving it a try without complicating the issue. I've installed on a VDI machine Windows 8.1 Enterprise without vGPU and any graphics enhancement, and believe me the performance of normal and 3D graphics are unbelievable..   
Hi, I have a requirement to for one user to use AutoCAD... Is there any tips / recommended steps to run it with vWorkspace as Session Host applications? Note: These servers doesn't have vGPU card it has only the default graphic card. Thanks, 
Publishing AutoCAD 2011