I don't think bluetooth will disappear anytime soon. It is too convenient and universal a protocol for connection. It has taken far longer than many thought it would for bluetooth to become as prevalent as it is today, and the mobile electronics industry has embraced it too thoroughly for that prevalence to disappear for quite some time.
For those who don't use bluetooth much (or at all), there are always balancing individuals who do. For example, I use a bluetooth headset for my cell phone, a bluetooth keyboard/controller for my home theater PC, bluetooth connectrs my Wii controllers, I use a bluetooth mouse while on the road, and a bluetooth GPS module for navigation... Wow, didn't even realize how often I use BT until I started that list. And that doesn't even count on a professional level, with one my company's main products which uses bluetooth to remotely connect our PDA-based controller and measurement devices, as well as bluetooth connections to a mobile printer for output... Glad I'm done having kids, with all this bluetooth radiation floating around me, I must be sterile by now! heh