Timed to this announcement is the ability to begin pre-ordering the game on Steam.
The release also made sure to acknowledge Modern Warfare 3 will have dedicated servers support, a former point of contention between Call of Duty's PC fanbase and Infinity Ward. Modern Warfare 2 did not include dedicated servers, which prompted legions of gamers to petition the developer ahead of the game's release. Modern Warfare 2 went on to sell just fine on PC and elsewhere, but this time around, players won't have to worry about dedicated servers being an issue.
Modern Warfare 3 releases on November 8, but this weekend, Activision's hosting Call of Duty XP in Los Angeles, a Blizzcon-esque weekend event where the game's multiplayer will finally be revealed.