Here's a list of ALL confirmed playable games at TGS at the moment, it'll be interesting to see what small % of this actually ends up on BRING IT HOME.
Garou Densentsu SPECIAL (SNK)
Lost Planet Extreme Condition (Capcom, singleplayer and multiplayer)
Dead Rising (Capcom, only playable at MS booth)
Kengo Zero (Genki)
Project Silpheed (Square-Enix, only playable at MS booth)
Full Auto (Sega, JP version)
Sonic the Hedgehog (Sega)
Earth Defence Force X (D3, listed as Earth Defence Force 3 by MS, playable at both booths)
Oneechanbara vorteX (D3)
Dead of Alive Xtreme 2 (Tecmo)
Culdcept Saga (Bandai Namco Games)
Gundam Operation Troy (Bandai Namco Games)
Idolmaster (Bandai Namco Games)
Trusty Bell (Bandai Namco Games)
Table Tennis (MS)
Vina Pinata (MS)
Lost Odyssey (MS)
Crackdown (MS)
Tenchu (From)
If a Xbox360 game is not on this list, it is slated for video only, unless the game has not been formally announced and might be a surprise playable. Blue Dragon is not on the list because it has not been confirmed as a playable, but is very likely.
Source links:
http://www.famitsu.com/game/news/2006/09/13/103,1158141897,59995,0,0.html
http://www.famitsu.com/game/news/2006/09/13/103,1158149808,60007,0,0.html
http://www.famitsu.com/game/news/2006/09/14/103,1158235581,60134,0,0.html
Edit: Hmm, actually Famitsu might still be updating. I don't think they have all the booths and publishers up yet. I'll update if/when they do!
Edit2: More sources, 2 more titles -
http://www.gpara.com/comingsoon/tgs2006preview/index.htm
http://www.gpara.com/article/cms_show.php?c_id=420&c_num=14