Deaddude, first of all, I have NO problem with people wanting to be hearing. Of course, those who value Deaf Culture may take an issue with stem cell to treat deafness but that's NOT my point.
My point is that I am not sure about how much progress we've come with the stem cell technology for deafness. We've tried many times with so many ways to treat deafness and we've failed - hearing aids only amplify sounds WHEN you have some residual hearing and CI's are the only FDA approved treatment for deafness with dB loss of 90 or higher. I remember clearly when I was growing up, I'd look for any treatments and stem cell was often mentioned... and to this day, I haven't seen it materialized while they progressed with CI technology.
It will COME to the day when we can finally treat deafness with stem cell technology but it ain't today unfortunately and the sources you cited aren't something I would trust.
I know many Deaf people would take offense to the idea of "wiping out deaf people" with stem cells and that is entirely a different issue - I am talking about the technology we have, not how we apply the technology.
