I know that several big names in headphones - no, ALL the big names - think that's going to change very soon. Every one of them is well along in design and production for that market.

Who will win? I do not have a clue. If I did, I'd be loading up on their stock. But I do think that it will be more than a hearing aid. It's very easy to get health information at the ear: heart rate, breathing rate, temperature, and probably more. That is where the winner will probably come from.