I really don't see how people think MGS4 will make the PS3 outsell the Wii, even for a week. After all, the 360 and PS3 boosts put together for GTAIV were still easily trounced by Wii, and GTA is a much, MUCH bigger game, saleswise, than MGS. Without a matching release like Mario Kart this time, Wii may not DOUBLE PS3's sales, but it won't be outsold.