I concur with the future of mp3 mixing being alive and well , I think the focus of this discussion should not be IF it has a future, but how long it will take for a significant acceptance of this technology.
The interesting thing about this change too me is how mp3 technology makes it a fast process for new music gets into mainstream. In retrospect this speed kind of seems to eliminate "underground" music. I appreciate this because it forces djs to put more effort into their mixing abilities since their "unique" track selection abilities become far less signigicant.