Ok take deep breaths and calm down. E3 has the press conferences for a couple days then 3 days of being open to the media on the show floor, which consists of a couple of buildings full of booths for developers to show off stuff to the press (hands on, live demos, one to one talks etc.). If it happens anywhere it will be here, but imma drop bombs for you now, SE are pretty good at showing stuff in private to select members of the media, so don't expect too much "showing off" to go on. I'd have thought most of this stuff will be presented alongside pre-booked interviews.

This is all a hunch but I'd bet good Gil on it to be honest.