I agree that COD reveals and Fifa are being heavily undervalued. This are monstrous reveals to have at the reveal of your new system. I'm not all that excited about COD, but I love Fifa to death. The point is many people the world over go nuts over those two franchises, and to have them both appear at your console's reveal conference, almost as if your console is the preferred target hardware for these titles, is no small or insignificant thing.
Microsoft is smart. They doing what gets the most attention possible. They are going for as loud a reveal as possible, and while some new exclusives may get hardcore gamers going nuts, they won't generate the same degree of press and mainstream excitement as the likes of Fifa and COD at your console's unveiling. And who knows what else they may have planned. As they said, E3 is all about games, tons of exclusives and world premiers. The reveal event is about the team behind the system, the vision for system and then they'll also be teasing some games also, but they're saving up to make the bigger splash for hardcore gamers at E3. I don't see what's wrong with that.
If people believe that Sony didn't more or less do the same thing, then they need to take a harder look at the Sony event.