Another reason to do it now is the short supply of both the PS3 and Wii. Gamers are going to be disappointed this weekend when they realize that there were only 8 PS3s at their local store. What better way to cheer up a depressed gamer than with a spanking new Xbox 360 at a reduced price. Heck, you could even throw in a game, like 'PGR 3' or 'Oblivion'...something that would make the gamer want to play on Xbox Live.
Point is, Sony is reeling, the Wii isn't direct competition, so now is the perfect time to go after Sony's jugular. I predict a $50 price drop on Thursday.