I know some people think Microsoft is weird for not showing off things like this at E3, but remember they have a lot of time and money invested in Kinect and so they have to show a lot of reasons to use it as well as show actual games for it.
I personally feel Microsoft should have showed The Witcher 2, which is an exclusive RPG. Also "Blackwater" is an exclusive Xbox 360 game that didn't get any attention at E3 this year. The pictures below are from a new AAA title called "Bloodforge" and looks ultra violent.
My guess is we will see more of these games next E3, Imagine an E3 with new IP's announced for Microsoft? It could be epic.