Because PS3s are sooo cheap!
Q2 2010 release date...
Oh well. Gives me time to save up some cash for a PS3. Up till now, I've refused to buy a PS3 due to the costs. I mean, I'm a college student; I don't have that kind of cash on me!
(And even though Star Ocean and Tales of Vesperia are on XBox360, I'm not buying a 360, either.
I can understand what you mean, I got my dad to pay half with me to get my PS3 on my birthday since it was like £400 >.>, although a little of topic slightly, you don't have to worry about Tales of Vesperia on the 360 as a better version is being ported to the PS3

On topic, I can see FFXIII being pushed back a bit, and for Square Enix, it wouldn't be the first time they've delayed a major title, I think it's just a case of they've underestimated how much time they really need >.>