There's a pretty good chance we'll see Fallout 4 at the Microsoft conference in an hour and a half. Though there's also a pretty good chance they'll wait to reveal it at the Spike VGAs like they did with Skyrim.
We'll also see Mirror's Edge 2 which is cool. According to Gaf insider Crazy Buttocks on a Train (best username ever lols) Microsoft is paying devs not to talk about the PS4 version of their games. So unless a dev specifically says a game is Xbone exclusive, it's safe to say it's also on PS4.