It's not that easy to pick up every speech utterance in a wide range and separate it by speaker. The further away the sound is, the less intelligible it is. An

It's not that easy to pick up every speech utterance in a wide range and separate it by speaker. The further away the sound is, the less intelligible it is. An artificial non-directional microphone is unlikely to pick up with the same clarity or distance as with your own ears. There should not be any privacy concern with having a microphone ear vs a biological ear. If there is a concern the best way to manage it is to not talk about confidential topics with other people in the room. There won't be any ads, because people would just use their phones instead which don't have ads. Specifically Google Live Transcribe, Otter and the like. Those require a data connection to the network, but there are versions that don't need the network at all. E.g. Chrome's Live Caption option. Eventually as technology becomes more power efficient and miniaturized it won't need to be paired to a phone. The advantage of glasses is that people find it very distracting seeing a phone scrolling away, my GP stares at the phone instead of me because he is fascinated by it. Sometimes you can't be holding a phone up if something is being worked on. The glasses would also allow for a bit more directionality. It's a promising tool depending on how well it is implemented.