At their E3 2010 Media Briefing, Microsoft announced that they’d signed a deal with Activision that would give them a window of exclusivity over all Call of Duty downloadable add-on content through 2012. In other words, if you are a big Call of Duty fan, and you want access to the game add-ons as quickly as they become publicly available, you’ll want to be playing on the Xbox 360. If you are on PS3, you’ll likely need to wait a month or two before you can download the add-ons. Interestingly enough, they said this was an Xbox exclusive, and not an Xbox 360 exclusive. Of course, there is a high probability that Microsoft will have announced and launched a new Xbox before the end of 2012, and if that is the case, the agreement will carry over.