Stereoscopic 3D is likely to become a boom in the next year or so (what with 3D monitors / Head Mounted Displays and 3D TVs being released / developed all over the place by Zalman, iZ3D, TdVision, Vuzix, Samsung and the like). So compatibility with Stereoscopic - 3D would be a stand out feature. The ability to do that natively would be preferable, but compatibilty with the drivers for the main types (Duel Monitor, Sequential Field) would be good also.
See the Stereoscopic 3D group 'Here' for more information.
Stereoscopic 3D can be done with Blitz3D right now.