A full Linux system offers a comprehensive set of libraries and APIs, including the OpenGL API with a number of accelerated hardware drivers implementing it.
If people instead write Windows games meant to run on Windows platform, this doesn't mean that a Linux implementation of Windows API is all of the sudden "3D in Linux". It just means that nobody is writing Linux games.
WOW, Tomb Raider and Crysis don't run on Linux. They are not Linux programs. They are Windows programs. They are not "3d on Linux". That's the problem.
Instead of AMD concentrating on Windows compatibility, I think that you should concentrate on Windows compatibility. By installing Windows