Tokyo Xanadu IS in fact coming out in the USA and it's on for early 2017. The publisher is XSEE... uh, no. Aksys.
Both the Vita version and a PC port will be released digitally (PC on Steam), with Vita also getting a boxed release.

Falcom probably figured XSEED had gotten a little too busy at the moment, with Xanadu Next (planned for Summer), TitS the 3rd, and ToCS 2 on their plate.

The PS4 version, Tokyo Xanadu eX+, is not yet on Aksys' schedule. YET.