Well these are more than predictions ;)
1. $450 basic, $550 with double memory and a month of PS+.
2. Backwards compatibility with digital PS3 games only through Gaikai. Other digital content can be locally played.
3. Controller has a central touch pad similar to Ouya. Coincidentally PS4 runs Android. Controller also breaks apart and has full motion sensing.
4. The controller has NFC.
5. Controller has traditionally placed analogs with convex tops.
6. PSEYE 3 is included. Has one camera, 1080x1920 at 30hz or 720x1280 at 60hz, and uses sound to calculate 3D depth.
7. Vita works flawlessly to replicate the Wii U experience. Only difference is it can also work over WiFi allowing full remote play.
8. Infamous 3 is a day one launch title.
9. PS4 can output 4K resolution during menus and content playback. Games are capped at 1080 until 4K TVs become more popular.
10. All games support 3D.
11. Looks similar to the PS2.
12. Can actively record screen output while you play. Also allows screen capture.
13. Games cost $60 still.
14. PSN stays free.
15. PS+ users can "loan" digital content to other PS+ users.
16. GUI is an upgraded version of LiveArea designed to work best with motion controls.
17. Almost all games have motion controls as an option. Of course a few require it.
18. Console is sold for a $160 loss at $450 and a $130 loss at $550.
19. PS4 releases September 17 in Japan and America. Europe gets a release two weeks later.
20. PS4 can be remotely operated by smart devices.
The only thing I don't know is when this information will be revealed or if it will change.
