I think you are exaggerating M$'s issues here
I think to get most people happy, they need to show of some footage of Halo, more of a tech demo than anything else I suspect, show some new interesting games from their other secret first party studios and I suspect they will have some nice 3rd party stuff there too
To get me excited, they need something like Lost Odyssey 2, as well as other really interesting exclusive games. Given that it is strongly rumoured to come with Kinect 2, they need to show it is actually useful for "proper" games and not focus on party games too much. Having said all of that, there is almost nothing they can do to get ME to buy it day 1, I am too much of a PS fanboy for that







