You don't need a keyboard for an MMORPG, if you have voice chat and the game is simplified enough. People also used to say that first person shooters wouldn't work on a console. Well, they work, and they are also very popular (they suck compared to mouse and keyboard, but by golly, they work).
Do you really think that it will be a good thing if the PC is dominated by amateurs and developers with only three people? That's what it was like in the 1980's