I hate to be a party-pooper, but if only this statement were true... Really the only titles I would consider to be A-list now available for the Mac are Valve and Blizzard's offerings. It seems the only reason RAGE came to the Mac this quickly is because it runs on OpenGL. And this situation overall really sucks! I mean, Call of Duty 4 is on the Mac, why hasn't Activision bothered with any subsequent ones?!
Even sadder is that I feel like game developers are increasingly just shunning the computer (i.e. including Windows) in general- I suppose they see consoles as the way of the future. I, however, maintain that gaming on the computer (Mac or Windows) is by far the superior experience.
Besides, I feel like buying this game on the App Store is a total and utter waste of time... Probably a better idea to wait until the Steam version is updated with OSX support!