And it likely won't be because Molyneux is smart. He knows from experience that you can get it right, or you can be on multiple platforms--but you can't do both.
Not that smart, he didn't get it right, since Fable 2 is full of bugs, some which ruin the game.
Fable 1 was on PC.
Molyneux knows what to do but, doesn't quite know how to do it. I personally thought Fable 2 was a big let down, I assumed that with the surrounding catalogue of seemingly "open world" RPG's Fable 2 would have been able to overcome the loading screens every 5 minutes that Fable 1 had on xbox. As far as role playing games go it is fairly shallow.
I played it through more than once however based on its charm alone but, it definitely wont make it into any long standing charts and would only be called "best rpg ever" by people who are new to the genre.