If this is done, I would be so much more inclined to get X10. I would rather use linux any day then have to face the dreaded viruses, trojans, spyware, malware, and adware that is windows. I don't know the difference really, but OpenGL and DirectX seem very similar. I do know it would require basically a rewrite of the entire engine, but, it's just a thought.
(And TGC, Imagine if it WAS cross-platform! So much more money! (That's my sorry attempt at persuading them

))
-Jim