If Sony buys all mario games and Nintendo focuses only on casual games than I would buy a second PS3.

Wii: I'm actually at the edge right now; KH3 goes to Wii and that's fine for me.
360: Main FF exclusive, .hack, Suikoden VI

Persona 5 on either would sell me a console.

ps3 - sandbox Pursuit Force 3, KH3, FF Versus XIII if it will be good, Yakuza 3,4 and kenzan US/EU release, Eight Days, Valkyria Chronicles 2
X360 - Conker 2, new Killer Instinct, KH3, Panzer Dragoon Orta 2, Jade Empire 2, Psychonauts 2,
any hd console that would receive remakes of Shenmue 1 & 2 or Shenmue 3/new Jet Set Radio/Grandia 4/D-3/Marvel VS Capcom 3/Skies of Arcadia 2

well i'm talking here about instant buying without thinking since i will be buying one of hd systems soon anyway.

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ugh forgot about Steel Battalion 2 and Persona if Atlus would actually made such a game for hd system.

 No thanks on this. I don't think the world needs anymore mario games. He is being milked WAY to much now.

Wii: New Zelda probably.

sony buys mario franchise: Super Mario Bros The Movie The Game confirmed. nah i think it would be even worse since for sony every game have to got multiplayer not to mention that it would end up as a Ratchet clone and would be milked even more than it is now(every year = new mario game or at least 3 of them).

PS3 - LittleBigPlanet, Metal Gear Solid 4, Resistance 2
360 - Gears of War 2, Virtua Fighter 5: Online
Wii - No More Heros
PSP - Crush, God of War: Chains of Olympus, Syphon Filter
DS - Contra 4, Professor Layton

At least 10 games that I want to get. List is not in any particular order:
MGS IV
NGS
NSGII
Atelier Rorona
Cross Edge
Trinity Universe
Devil May Cry 4
God of War 3
Valkyria Chronicles
White Knight Chronicles

Only 5 is out, so until the other 5 comes out in US, I'm not going to get a PS3 just yet. (I don't have a 360 and will never get one. My friend has one so I can always play his.)

LBP for PSP. It wasn't quite enough for a PS3, but if the handheld version is reviewed well I might have to make a purchase.