Regardless of who provides this, and even irrespective of marketing concerns, there most likely will be data leaks/theft. Imaging having audio+video recordings of what you see and what you say in the hands of the wrong people. And "the wrong people" could be a wide array of different parties, from banks to police to political enemies to nosy neighbors and beyond.

Granted, many of us already collect and give away significant amounts of very personal data, some of which regularly gets leaked or stolen; but first person video and audio recordings?... scary.

And then with Facebook... I trust Zuckerberg with my life data as much as I trust his choice in hairstylists.