Looks fake to me.
Reasons why I think so:
1. Old trailer, no new footage.
2. Announcer seems fake.
3. Audience does not look like the type of professional journalists Square would invite.
4. PS3 and WiiU but not Xbox 360. FF Vs 13 will be multiplatform, but there is no way Square would release the last two FF games on Xbox 360 and then skip it with the latest game. The engine has been ported and if it can run on PS3 it can run on Xbox 360 with little effort or modification. If it was getting a WiiU port it would most certainly get a Xbox 360 port. Square no longer ignores easy money.
5. The game will not make it to market in 2012 so it won't be the 25th anniversary of FF when it finally does get released.