And it still will be a big seller for the ps3. People won't buy a ps3 just for Ff and its not like they are not getting it anymore either. Just that the game is shared now. They have several other big system selling exclusives waiting to be dropped and this gen, I'm sure Sony are counting less on 3rd parties. They know MS is pulling out exclusives from under their feet left and right and it would be stupid for them to rely on this. If we have enough commonsense to realise this, I'm sure they do to.
However, also don't forget, Sony owns a portion of Square Enix. i'm sure there is something deeper and sinister to what plans Sony have made for MS.
With games like God of War 3, Tekken, Infamous, GT5, team Ico project; Sony hasn't got too much to worry about. However, to counter what MS did to them, I'm sure they will have some sort of surprise or another for MS. We will just have to wait 7hours and 30mins to find out what it is.