“What would it mean for your business if you could target potential clients who are actively discussing their need for your services in their day-to-day conversations? No, it's not a Black Mirror episode—it's Voice Data, and CMG has the capabilities to use it to your business advantage.”
But what about a car? Cars are as smart as smartphones now, and you certainly wouldn’t notice the small amount of power needed to collect and transfer data compared to driving the car. Some car manufacturer TOS agreements seemingly admit that they collect and use your in-car conversations (including any passengers, which they claim is your duty to inform them they are being recorded). Almost all the manufacturers are equally bad for privacy and data collection.
Mozilla details what data each car collects here.