It is not the job of Square Enix to maximize the PS3's power or anything like that. If this happens, it'll simply be because Sony failed to secure it as an exclusive, which you have to do nowadays if you want them from a third party.

Now, I'd like to see something better than XIII before I'd consider buying this one.

What did he mean that he was suprised about this? Was he suprised by the reaction of people wanting the game coming to the xbox 360? Or was he suprised by the negative reaction of the news?

He actually never said anything about being surprised. This is the quote:

"Versus on the Xbox? What was said at the investors meeting was only that until the official announcement is made everything about all titles is pending."