Even the origanl devolpers of Direct X's Direct 3D code, Qube Software strickly use OpenGL for all there projects(one of which is LEGO Digital Designer, which is OpenGL). A lttle about them here and free devoper kit: Qube Software
As for the next version of Windows called Vista, they are not even supporting fulll intigration. Its only going to be SOFTWARE EMULATION, that will be extreamly combersome. All the videocard manufactures on in protest, and I could very well see them all droping Direct X support entirly, and moving to Linux, Uniux, ect... Basiclly as aGorm said, Microsoft is trying to make everyone "only use" their formats and code. RISE UP EVERYONE AND PROTEST!!!
Sorry that was a long one, but I hope it clears things up.
