Just a quick link (linking to more sources) about just how badly supported OpenGL is, even by the "driver golden boy" NVIDIA:

http://en.wikipedia.org/wiki/GeForce...penGL_Problems

OpenGL is going nowhere fast. There are now entire super-popular lines of hardware that can't support OpenGL properly (as in, a driver fix can't/won't be released for it). And this is an issue that affects the "content industry" just as much as it affects games.

Can we have Direct3D on Linux yet?