Pay a "fee" I haven't read or heard any details about this... Is it literally that if I own 2 Xboxes I have to pay a fee to play the game in the other room I have the Xbox? Or is it GT based? I'm too lazy to search details...

I've got 2 Xbox 360s (Remember when I couldn't bring myself to buy 1? lol), and I forsee myself always having 2 of each console from now on, so just curious.