For me, its not even close right now, with the PS3 being the winner.
Games I will almost certainly purchase:
PS3: Killzone 2, Uncharted 2, God of War 3, Heavy Rain (possibly InFamouns)
360: Star Ocean 4 (possibly Alan Wake)
Wii: (possibly Conduit, Punch Out)
HOWEVER, I think that Microsoft and Nintendo will probably announce a lot more games and it'll even up.
Owner of PS4 Pro, Xbox One, Switch, PS Vita, and 3DS