Well, when it comes out on PS3, it's in a sense going to be without a keyboard as well. With the Vita, you have two touch interfaces that can be used for an on-screen keyboard not unlike most phones today.

If I recall, there are also some MMOs available on Android's marketplace. With SE's idea of keeping XIV still accessible to the casual market, having this pick-up-and-go/play in interval approach would work on a handheld, in my opinion.