I honestly believe that all of SW will fade away eventually. Not that it will become unknown, but that it will not be as well known as ANY of it is now. People will look at SW as a whole and say "Yeah, those were fun classics." But they will be regarded as, say, Indiana Jones is now. People will appreciate it, but it won't be something everyone will continue to know about.

The one thing about the general public that we sometimes forget as that, as a whole, they aren't such film citics as we are. Generally, they seem to be quite casual when it comes to such things. As TheCassidy said "They are controlled by the media. They will simply move on to the next big thing." I mean, film buffs will still love and cherish them, but to everyone else, they'll be just another series of so-called classics from the past.