It's not super common to give away goodies to attendees of E3 Press Conferences. It's true that in the past, Microsoft has given away their new Xbox 360 S edition to all E3 attendees, but since then, nothing.
What could it be? A Kinect-less Xbox One? Games? An exclusive "I attended the Microsoft Press Conference" Achievement?
We'll let you know as soon as we exit the Galen center.