Rewind Pendant: a wearable that captures what you say and hear

Black mirror references aside, how useful would this actually be?

If you’re using it to solve arguments with your spouse or at work then maybe more technology is not going to be a panacea for you

I could imagine a few professional uses which are less creepy. Students/teachers, comedians, legal/medical dictation.

I think the real power would be if it is wired up to an appropriately accurate text to speech engine and dumped to a searchable database. I have been blown away by how good Whisper is, but that requires too much technical expertise for the population. Having that workflow in a packaged product would be worth something not otherwise met by existing recorders.