Yes, coincidence.
Google announced a new version of the Android Hangouts app that incorporates (merges) many of the Google Voice features, including VoIP calling, that were already available on Hangouts for laptop/desktop computers, and on Apple iOS devices.
This doesn't have any relevance one way or the other to the inherent value of the OBi devices. If anything, it just shows that Google is continuing to invest in the Voice and Hangouts services.
I think this is a great price for a high-quality ATA, regardless of whether it's used with GV or a SIP ITSP.