Parents will continue to show thier kids the OT, and those kids will show thier kids the OT, and the PT will stay where it is right now---a nice little addition, but something you can rent and watch when you get the time. Not the OT. Never the OT. Parents won't try doing i in order. They'll go to Blockbuster (or Netflix nowadays) and look for a good family movie. They get to the S section. There's all six films. Which is the film they go for first? ANH. They go for ANH. Because when the words "Star Wars" appear in people's heads, they do not think the words "Anakin," or "1, 2, 3" or saga. They think "trilogy", "Luke," and "Vader." And then grab the ORIGINAL film.
I don't think that the "saga" will ever be realized. In this day and age, people are more impressed with flashy graphics than storytelling, I know. Especially the young people. But hell, I'm young, and I only like special effects when they enhance and add something to the film. Not when they ARE the film. And if at least one person exists in this generation, then all hope is not lost. And for reasons stated above, older generations will not let the flame die out. Their children of this generation will see the films, and though the PT might be something they find more interesting now, when they're young, but by the time they're 14, they'll realize the PT for what they really are, and only watch the OT.
The saga will never realized.