Hopefully the Open GL won't be a case of 'be careful what you ask for, you may just get it'.

Oh, rest assured, it will be, for someone. Graphics-card compatibility issues, these days, are almost as common as sound-card glitches in the early to mid-'90s. Just look at DAZ|Studio. Over a year since the public launch, and they're still having problems with Intel and ATI chips. It'll probably be worth it, though.