XGL

With the eventual release of Windows Vista and its rumored new 3D graphical desktop capabilities putting it beyond what is presently available for Macintoshes and GNU/Linux, I was left wondering whether any such thing was planned for Linux and when such capabilities would be released.
After a bit of searching I came across Xgl, it is an X server which is layered on top of OpenGL and because of this, it can accelerate drawing operations on the desktop. Xgl takes advantage of the processing power available in modern graphics cards by using their OpenGL drivers to hardware accelerate X, OpenGL and Xvideo applications. In general terms, think of the processing which is put into rendering frames in 3D games and then using that capability to render the humble desktop. What this means is that you get noticeably fast rendering anti-aliased fonts and can perform intricate graphical calculations far faster than other X servers without OpenGL.

XGL Video :
http://www.youtube.com/watch?v=Cz_2vKq5cZk&search=XGL