They needed to show games to convince gamers to buy it, and that's exactly what they did. They didn't waste any time with TV announcements, kinect games, or sports partnerships; they showed nothing but games, which was perfect.
You can argue against any of the individual games, but they really tried to appeal to us today, which instantly makes it the best microsoft conference in years. Though they had some technical issues, I don't think the conference could have been much better without bombshell announcements or the renouncing of previously announced Xbox One features (or announcing a better price... $500, sheesh).