As for my predictions:
1. SSM will definitely announce their new game and will be a launch title for ps4.
2. PS4 release date will be late october or early november.
3. 2-3 sku's: $350(very optimistic) or $399 with console, controller, and headset. $450 with lower sku but with a year of a new ps+ or a camera. And $500 with all of lower sku's but definitely has camera and maybe a game also.
4. ND could possibly show their ps4 game, but I won't get my hopes up.
5. Quantic Dream should have a new ps4 game trailer.
6. I believe there may be some 3rd party exclusives also, but don't know what they could be.