Yeah, as MRKs pointed out, it's already been confirmed.
I'd be really interested to see if these came to the west. On the one hand, Atelier is already quite a small franchise and Vita install base is even smaller (and made up of a lot of PS3 owners). On the other hand, the localisation for the game has already been done so it would literally just be a make-a-tweak-or-two-then-release-it job.
I hope they do come out. I'd much rather play games like Atelier on a handheld than on a home console.
@ Outlawauron, I wouldn't necessarily say that this is confirmation of good sales in Japan. I mean, they've clearly been developed very close to each other, this project was probably started well before Totori was released.
Then again, it's a PS3 -> Vita job of a very niche franchise anyway, I'm sure they wouldn't have to sell that many to make it worthwhile. Will be interesting to follow anyway. Team Ninja are bringing Ninja Gaiden Sigma 2 Plus across after the first only sold ~ 100k copies, so perhaps Vita porting really is as easy as it's made out to be.