Looks cool, but I don't know anything about this market so I can't really comment directly on utility or prospects. But, to take a tangent:
I think there's a shift that hardware oriented entrepreneurs might mine for some ideas.
Around web 2.0 time there was a shift where people got more comfortable with the internet. They used real names, and pictures without expecting this would inevitably lead to serial killers at the door. Facebook worked because people agreed to tell the internet their name. Online dating went mainstream. Twitter, Linkedin, all sorts of sharing become common. The interesting part is that the technological trends like were only part of the picture. Cultural shifts were just as important.
Tech is cool now, that's the new trend. Where a calculator watch in the 90s would get an 8 year old beat up, todays equivalents are status symbols. Interestingly, glasses became cool in recent years.
So, ideas might be found by looking over old technology that is uncool and seeing if it can be re-imagined as 2015 tech. A regular electric wheelchair is uncool. This segway thing is cool.
One real obvious device to think about Apple-ising is hearing aides. Hearing aids are so uncool 80 year olds don't want to be seen with one. They are all about being small, flesh colored and "invisible." I think there's a decent chance a bright green large ear piece might be cool.
And speaking of hearing aids… Can hearing aids improve the hearing of non impaired people. Can you get better than normal hearing from a hearing aid?