Yes, If Apple don't allow their product run on non-high-end system. for sure, their product life will be short. Same story about Softimage or Maya, in the past they need a very high-end TURE OpenGL card, however, now a day, almost every game-level OpenGL card could run it without any problem.
We don't mind for less performance at the beginning, because of without budget for an $$$ OpenGL card. At least, let us to taste it first.
Good Luck to Motion
Antonio Hui
ps: I just order my copy on Hong Kong Apple Online Store, not sure when will be on-hand.