Not that I remember there being any other Call of Duty demos in previous years, IGN has just released word that there will be no Modern Warfare 2 demo this fall. According to Infinity Ward, they will be spending every last moment perfecting what could possibly be the highest selling game of all time.
The developer will also not be participating in a public beta as well, citing the same reasons as above. Do we care? I think we pretty much know what the game is going to be like. Modern Warfare 2 ships on November 10th for the Xbox 360, PS3, and PC.