Something just occured to me that is so rediculous that it might actually happen. Sure it will be thousands of years off, but with genetic engineering being what it is, it is not inconceivable to consider the possibilty...
Someday, Wookiees and Hutts will roam this galaxy. As will Bothans, Mon Calamari, Noghri, and even the species that Yoda belongs to. Because if Star Wars has created this kind of following in only thirty years, imagine what it will be thirty centuries or thirty millennia from now.
What the Greeks and Romans did for modern civilization, Star Wars and other fantastic stories like it will do for future civilizations. In fact, one day, humanity, realizing that it is indeed alone in the galaxy, will create new species of aliens in its very own labs. And what will be the blueprint for this genetic tinkering? Aliens from fiction, including the Star Wars universe. These aliens will strike out on their own, finding habitable planets and moons, and voila! A galactic community.
It won't stop there though. Eventually humanity will figure out a way to genetically enhance itself to reshape the very nature of our biology. Once that happens, Jedi and Sith will be within the realm of fantasy no longer.
We here in this time can only look at a television or movie screen and dream. But our distant descendants will live it. Because today's story is tomorrow's myth.