Depending on the TOS details, that may very well be a legit crime. Even in 1-party consent states this wouldn't slide because LG isn't a participant in the conversations it's recording, and not everyone talking near a TV has agreed to the TOS.

And even with generous TOS, there's gonna be legal issues. HIPAA, for instance, could really fuck them if the TVs are in a medical facility and are recording and transmitting private medical data without consent of the patients.