Hearing aids are limited in what they can do and will be limited in the near future. Hearing aids never restore full hearing let alone actually improve your hearing.
Hearing aids operate only on the outer ear and are basically just amplifiers with some smartness built in (trying to cut out background noise, amplify foreground etc). So they're really limited in what they can achieve.
The two greatest hopes for the hard of hearing are 1. Cochlear Implants 2. Flawless speech to text translation. You want to be working on either of those two.
At least they could if his insurance covered the expense. Instead, he wears tech that's a few years outdated.
Not terribly cool now, but hearing aids are becoming cyborg tech. Better hearing than your peers with broad device interoperability - it might be enough to make folks with decent hearing to consider buying aids, like athletes and lasik / performance contact lenses. We're not far from slightly-outdated hearing aids being pretty cool.
And no, I'm not making light of his deafness - I'm just echoing his own excitement.
Another friend just bought a hearing aid. The (other) comment about product + service is absolutely true. This friend marvels at the sophisticated DSP stuff going on. This friend is also grumpy that the internals are proprietary, so there's no way hack it, or even do adjustments. It's probably better for most people to have the expert do it, hearing is complicated stuff, but the principle stands.
With the costs of R&D, manufacturing, sales/service/support, and especially regulation/approval, it's not clear to me how the markets for low volume products are going to be disrupted.
Here's a recap of the market from Consumer Reports:
http://www.consumerreports.org/cro/2012/12/hear-well-in-a-no...