Definite day 1:

• Deus Ex: Human Revolution
• Final Fantasy XIII Versus (if it's released of course)
• The Witcher 2
• Dragon Age 2
• Uncharted 3 (again, if released)

Not day 1 but almost certainly will purchase:

• Duke Nukem Forever
• Age of Empires Online
• The Last Guardian
• Crysis 2
• Rage
• Zelda (Wii)
• Elder Scrolls V (if released)
• Killzone 3

Possibles:

• Conduit 2
• MGS Rising
• E.Y.E (PC game)
• Resistance 3

Definitely:

- Little Big Planet 2
- Killzone 3
- Mass Effect 2 (PS3, although I already have it on 360)
- Yakuza 4
- Nintendo 3DS plus some games (also some DS games)
- The Last Guardian
- Resistance 3
- inFamous 2
- Kirby's Epic Yarn
- Zelda: Skyward Sword
- Gears of War 3
- Ico and Shadow of the Colossus Collection

Perhaps:

- Motorstrom: Apokalypse
- Bulletstorm
- Crysis 2
- Portal 2
- Sorcery
- Ratchet & Clank: All 4 One
- Twisted Metal

Many will be added to those when some announcements come in

Maybe Zelda 

Marios Sports Mix

if they come out Xenoblade and The Last Story

DAY 1

• LittleBigPlanet 2
• KILLZONE 3
• inFAMOUS 2
• Uncharted 3
• The Last Guardian
• Team ICO collection
• L.A. Noire
• Mass Effect 2 & 3
• Hitman 5 (maybe)

Zelda: Skyward Sword

Zelda: Ocarina of Time

Kirby Epic Yarn

Last Story (if get's released here)

Resident Evil: Revelations 

Mario Kart 3DS

Paper Mario 3DS

Metal Gear Solid 3 Naked Sample

Gears of War 3

Marvel Vs Capcom 3

KillZone 3

Monster Hunter 3rd Portable

Dissidia 2

Every game in that list is either a sequel or a familiar brand. Last Story is the only new ip, it seems as though the industry is relying on already created brands too much.  

• LA noire
• Brink 
• Homefront
• Bulletstorm
• Rage

Day 1:

Marvel VS Capcom 3

Mass Effect 2

Dragon Age II

Killzone 3

Batman Arkham City

Resistance 3

Will Get:

Bulletstorm

Crysis 2

Deus Ex Human Revolution

Ghost Recon Future Soldier

Hunted The Demon's Forge

LittleBigPlanet 2

Portal 2

Ratchet and Clank All 4 One

Should be on the list and will get:

ICO and Sadhow of the Colossus Collection

The Last Guardian

On the List but is releasing in 2012:

BioShock Infinite

Metal Gear Solid Rising

Street Figther X Tekken

Tekken X Street Fighter

Tekken Tag Tournament 2

On the List That Will be Day 1 but doesn't have a solid release year:

Final Fantasy Versus XIII

Agent

Might Get:

SOCOM 4

Twisted Metal

Trinity Zill O'll Zero

RAGE

Dungeons and Siege III

Other Platforms:

PSP:

Dissidia Duodecim Final Fantasy

Final Fantasy Agito XIII

3DS:

Metal Gear Solid 3D Naked Sample

Kingdom Hearts 3D

Mario Kart 3D

Dead or Alive 3D

DS:

Pokemon Black and White

PC:

Guild Wars 2

Alright cool, I'll keep my eyes on these games to see how they turn out.

Wii

• Fatal Frame: Crimson Butterfly
• Xenoblade
• The Last Story
• The Legend of Zelda: Skyward Sword

Nintendo 3DS

• Ocarina of Time
• Resident Evil: Revelations
• Metal Gear Solid: Snake Eater
• Professor Layton vs. Ace Attorney
• MH 3DS . I'm almost certain it will be announced, only question is whether it will be a 2011 or 2012 title