I don't think there will be any boost, outside of that from the Pro price drop. A multiplatform game that is coming out over a year from now will not boost sales at this point in time.
Sure the announcement was surprising, but it's not going to make people run out and buy 360s. The few people that would buy a console for this game so far from release already have. They bought ps3s, probably at launch. Anybody else will wait until the game is closer to release, or else they will pick up one of the two systems for other games coming out sooner.
Just look at the forums. If there aren't people on hardcore gaming forums talking about buying 360s immediately because of the announcement, who else would be?







