I don't doubt that the perseverance of ANH as "the first Star Wars film" will remain---BUT, if i am a 15 year old kid in 2030 looking at a six-episode series that is known as a continuing saga, i am going to pop in the episode labelled Episode I, even if i am well aware that the last three were filmed first. It would just be stupid for a new viewer to assume a different order of viewing, and most new viewers will not have hordes of oldschool fans to convince them to watch the episodes in a backwards order. Even if i had heard that some fans preferred to watch the films in shooting order and not episode order, i would still still default to episode order out of the natural assumption that the story will progress most comprehensibly from this viewing.

But this is all based on the assumptions of the prequels being treated on equal ground with the OT, which is what Lucas is trying to do for precisely the above reason. But i don't think this will happen. I think the PT will be so ignored that "the star wars series" will continue to remain as simply the OT, and that many future fans will hear about the films as a really good trilogy from 1977-1983 that also has some prequel films made for it that suck. That seems to be the road that things are heading. The only thing preventing them from completely going down such a route is that fact that Lucas seems very adament that the films only be viewed and, in the future, packaged and marketed as the six episode Saga--precisely because this is the only way that people would continue to view the prequels. They have to be forced.