I think the biggest coup in the war of consoles would be for one of them to land WOW.
Or Second Life, but with Mii's.
I don't think so though. IMHO WoW / SL only really appeal to people who are already pretty heavily into games in some form, and probably already have all the hardware they want. The thing that will win is the mass-market, which is why you are right about Disney (and any other downloadable media that may be to come), and where Wii is winning (for now).
However, apart from LittleBigPlanet (which I worry may yet turn out to be a novelty) and Assassin's Creed (which I'll get on PC thanks), all the games I want are on Wii.