Basic scenario:
You play on a mobile with accelerometer which lets you be a driver. Maybe you're a taxi driver, or some other transportation driver, or if it were a mechawarrior type maybe you drive the robot (via touch screen UI and accelerometer) while your teammates on PC are gunners/rocketlaunch operators, etc. Similar for ship combat games where your teammates run cannons or artillery while you drive, or a flight game with multiple positions to fill (bomber simulation or something). Later you could login to your account from a PC and do the other roles, but not "driver" type roles.
Seems like it could be a far more immerse role playing game.
I guess the limitation would be graphics, like would PC players have to use mobile quality graphics since mobiles would be in game? I know networking-wise I've seen both PC and mobiles log into a multiplayer server, so it's do-able.
I think the bigger problem would be expecting a certain ratio of mobile and PC players, like if you design the game so each team "needs" a mobile "driver" and there aren't enough mobiles for the number of teams waiting.
Just daydreaming....
