On the headphones side, we are getting smaller, truly-wireless headphones with some ambient sound features (such as noise cancellation, and iOS hearing features). New trends like AR would just accelerate the change due to the need to solve all day worn audio devices.
On the hearing aids side, almost every hearing aid today acts as an always connected set of headphones for your mobile phone (and has been like that for years on iOS).
Deregulating this could bring the tech industry innovation to hearing aids through natural progression of headphones technology.
This trend would make hearing aids not just target hearing impaired people, but also individual with normal hearing. For example, features such as protecting your ears against a sudden loud noise, silencing a loud restaurant so you can have a quiet conversation or improving the audio of a soft speaker could be useful for everyone.