He just said 'something for fans', it can be just a beta or something. Doesn't sound as an event as big as important as Playstation Experience seems to be, with game announcements, panels with VIP and almost a hundred unreleased games to play.
-Battletoads announcement CGI trailer(by Rare)
-Quantum Break playable version of the last gameplay video.
-Ori playable version
-Halo 5 MP beta playable
-Announcement of XBO Gears collection (outsorced, 360 games at 1080p 60fps with some extras)
-The rumored PC ports of Forza 2 and Sunset Overdrive that appeared in a store.