Microsoft and Lionhead's episodic Fable II experiment was phenomenally interesting. They broke up the game into chunks, giving the first one away for free. If you wanted more, pay up. You'll be able to do the same thing eventually with Fable III, too, which user osubluejacket applauded:
"For all of the people who HATED Fable 2, this would be PERFECT for you. So you hated the second one? No big deal, download the first part of the third one for FREE and see if they 'fixed it'. If they did, you can buy more, chapter by chapter, or you can go buy the full retail copy."
There doesn't seem to be a downside here. I'd love to see more games embrace this. You?