I think Deaf Culture will change to reflect the changes in our wider society, but I don't see that it will ever die out. For instance, in the 1920's, Deaf Clubs were necessary for contact and communication with other deaf people. The only way to communicate was face to face or by writing a letter. Now we have Backberries, Sidekicks, email, texting, VRS. It isn't necessary to be face to face with another deaf to communicate with them. There are other ways besides writing and mailing a letter to stay in contact. This forum is another way for deaf to stay in contact with each other.
Deaf will always seek other deaf out because it is the sameness of experience that draws them together. We all want to be understood, and who better to understand what we are going through than someone who has walked the same path we have? In that respect, the culture will never die out. Oralism in the past has not been able to destroy the bond that deaf people have with each other. It has not succeeded in integrating the deaf into the hearing culture completely, even though that was exactly what it was intended to do from the very beginning, and is still intended to do today. Oralism has seen a revival with the increased implanting of not just adults, but children at young ages. I think the culture will change to readily accept implanted individuals into the culture when they learn that the CI does not make integration into the hearing society as easy as they were told it would.
There have always been orally raised adults finding the deaf culture after years of being denied exposure to it. That is not going to change. There have always been a few orally raised adults that bought into the myth, and think they don't need deaf culture. That will not change. Deaf Culture has survived over the years despite the fact that the oralists have attempted to destroy it. It will continue to exist. Deaf people will always continue to seek contact with others who share their experience. Modern technology through the use of pagers, email, VRS, etc. has just changed the way they seek each other out.