There are start-ups in the "hearable" marketplace. Things like https://www.nuheara.com/ https://www.nuheara.com/ have products out already and there's various

There are start-ups in the "hearable" marketplace. Things like https://www.nuheara.com/ https://www.nuheara.com/ have products out already and there's various ones like http://www.waverlylabs.com/ http://www.waverlylabs.com/ coming along focusing on things like instant translation as well as hearing augmentation. Of course whether they'll all just getting steam-rollered by Apple/Google is another matter...