That pretty much nails the coffin shut on Final Fantasy XIII making its way to the Xbox 360 before the PS3 gets its act together with a price drop and some other solid titles. Sorry Xbox 360 fanboys, you can still keep hope alive with that other fence-sitting espionage title that companies swear is a PS3 exclusive, even though the rumors just won't die. As for Final Fantasy XIII on the Xbox 360, you don't have to go home, but you can't stay here. Move it along.
[Update: Square Enix now says it's still open to the possibility somewhere down the line. Maybe.]