That isn't proof. Proof is if someone manages to leak a memo from a microsoft executive saying the nextbox launch event needs to be pushed up because of the playstation 4 launch event. Correlation does not imply causation. It may be entirely possible that you're right, but we will never know unless actual proof is leaked.
Anyway I expect them to show some innovative new feature with kinect 2.0 that wasn't possible with the original kinect. We already know CoD Ghosts gameplay trailer will be revealed. I believe that they will also tease a bunch of new IPS. I think Microsoft understands they pissed off a lot of their core audience these past few years. They know that if their launch period isn't filled with exciting new content they will lose a lot of their core playerbase.
