@Leo-J: As for the PS3 to PS3 sequels you mentioned, none were a similar phenomenon that would make sequel to sell consoles for the people who doesn't already have one. Resistance and Killzone sequels are going to eat each others sales and there are more shooters coming for christmas i believe. I forgot all about GT5, you're right about that one, but FF13 isn't going to hit christmas market.
How much did God of Wars sell? If i'm not mistaken, they did pretty well, but nothing big considering PS2 userbase.
Now, the 3rd parties, there's really not much financial sense for them to publish something for PS3 instead of Wii. Of course, PC and 360 will play their part in this game, but not exclusives.
And as you said, Sony has more left, than what M$ and Nintendo have put so far, but obviously Nintendo has more left than what Nintendo, M$ and Sony have so far put out combined.
Ei Kiinasti.
Eikä Japanisti.
Vaan pannaan jalalla koreasti.
Nintendo games sell only on Nintendo system.