Personally speaking, I don't think it's going to happen in the near future. Until something is really mainstream, it's a pain to get merchants to start accepting something -- and even then, some seem to hold out longer than others. I commend the handful of sites that have started accepting it, but I think that there needs to be some huge push to get the rest of the world to use it -- and I don't know that there's really any driving force that's pushing people to accept Bitcoin right now.