The original authors finally got around to making their DeepArt app, so we have at least two players in this space atm.

I think either of these two players will incorporate this research, but there's no clear incentive for anyone else to try and get in on this market now. It's not clear that there's a whole lot of money to be made here, but who knows maybe usage will explode. I mostly expect an acquisition.

Prisma was just the first polished app released using style transfer. (However, since the technique is public, it will make an acquisition of Prisma less worthwhile)