Well, I'm going for focus on a few publishers...
Namco
-Soul Calibur 3 for all consoles (GC/PS2/XB), GC version will have a Zelda tie-in
-Soul Calibur 3 gets expanded Xenon port for launch
-New Flagship Studios (former Blizzard North devs) RPG for PC/Xenon
-Mr Driller: Drill Land for GC, budget release
-Katamari Damacy 2 for PS2, budget release
-More GBA localizations (Mr Driller Ace, Tales of Phantasia, Klonoa Heroes)
-Pac-Man World 3 for GC/PS2/PC/XB
-New Klonoa games for PSP & DS
-Tales of Legendia for both PS2 & GC, Eternia for PSP
-Dead to Rights III for Xenon/PC
-Rune Chaser for PS2 becomes a RR spinoff
-Baten Kaitos DS to be a prequel
-Xenosaga DS to be an expanded Pied Piper port
-Tekken for PSP, Soul Calibur for DS
-Namco Museum for PSP & DS
-Ace Combat for PSP
-Mr Driller for PSP
-Namco x Capcom for PS2
-PS3 & Revolution support confirmed, RR6 for PS3 launch
Capcom
-RE4 Director's Cut for GC/PS2/XB
-Xenon support announced, but no games at the show
-Capcom Classic Collection Vol. 1 for GC/PS2/XB
-MegaMan X Collection for GC/PS2/XB
-Megaman X9 for PS2 and Megaman Zero 4 for GBA
-Shadow of Rome 2 for PS2
-New Breath of Fire for PS2
-New Bionic Commando for PS2 & maybe Xbox
-Ookami for both PS2 & GC
-MegaMan Battle Network 6 for DS, online enabled
-Viewtiful Joe DS all new, VJ PSP to be collection of VJ1-2
-TWW Link playable in VJ DS
-More 2D fighters for PSP, at least one 2D fighter for DS
-RE spinoff (Outbreak maybe) for PSP
-Monster Hunter for PSP
-Capcom Vs Namco fighter announced
-Steel Batallion DS
-Shantae 2 for DS
Sega Sammy
-Phantasy Star Universe for next gen, Xenon version confirmed for summer 2006, PSO style ARPG
-Panzer Dragoon 4 for Xenon, also a racing game from AV
-Shenmue Online for both Xenon & PC
-PSO Blue Burst for GC/PS2/PC + PSO DS
-Shadow the Hedgehog for GC/PS2/XB/PC
-Sonic DS to be a 2D platformer with 3D visuals
-Super Monkey Ball 3 for GC/PS2/XB
-New Super Monkey Ball for DS, DX port for PSP
-VF4 FT for PS2, budget release
-Chu-Chu Rocket! DS, online enabled
-Sega Rally 2005 for PS2, online enabled
-New Guilty Gear announced
-The Rumblefish for PS2/XB
-Chaos Field Extended for GC
-Virtua Tennis for DS & PSP
-Bleach fighter for GC by Eighting, DS action game too
-Shining Force Neo and Shining Tears II for PS2
-Project S is a Shining game for PSP
-No more GBA games from Sega
-Sega Classics Collection Vol. 2 for PS2, includes VF2
-New Crazy Taxi announced
-Golden Axe revival (a la Shinobi & Altered Beast) for PS2
-Picks up Wreckless 2 for Xbox and Tenchu for PSP
Square Enix
-No Xenon support, but 'interested'
-DQ8 to get major media blitz
-Tons of PS2 localizations announced (Radiata Stories, Romancing SaGa, FMA3, Drakengard 2, Front Mission 5)
-Both FFXII and KH2 to release this year
-Front Mission Online PC only in US
-FFCC DS online enabled
-BC FFVII ported to DS
-FF3 DS remake to use CG backgrounds with 3D models (a la PSX FFs)
-New KH games for both PSP and DS, PSP gets an ARPG, DS gets a card RPG
-CC FFVII for PSP to star Cloud, trailer shown
-New Mana games for PS2 & DS
-New Ogre Battle game for DS
-New Einhander, Star Ocean & Front Mission games for PSP
-DQM Slime Story for GBA to release alongside DQ8, published by Nintendo
-DQ Collection (DQ5+6) for PS2, DS DQ games promised but not shown