ff13 was the only big thing about ms conference. everything else was no real news or not that impressing.
FF13 was probably more a shock for the fans than for sony who probably have been informed some time earlier already.
I think sony would have liked to keep ff13 exclusive but with the dev costs of such a game its very hard to keep a 3rd party dev. exclusive and i guess the great sales of gta4 on both consoles combined were what lead to the decission. Porting a game to the 2nd platform probably is a lot cheaper and increasses sales by at least 60-80% so if you looking at 100 million or more dev costs then its very hard for a game studio to stay on one console.
so i guess se asked sony for money to stay exlusive which was probably to much for sony since they are focussed on profit this year.
