During an interview last month, Red stated that work on PATS was still on-going, but the momentum really went out of the program when UCAR was cancelled. XworX was due to demo a full-scale PATS testbed this year, but Bell probably has other priorities right now.
PATS is really of greater use for military operators than civil users (reduced IR signature, dash speed), and with Bell having already dropped the tailfan due to 'negative feedback from a customer advisory panel' (plus other issues), the rumor is that the company has re-embraced 'conventional' tail rotor layouts such as the 429's scissors configuration for now.
I/C