I think you can only start to judge quality as you hit highschool and in your 20's and that is when you will see many people change their views, cause trust me I did a 180 on ROTJ when I was in high school, and I did the same 180 on ESB in that same timespan, coincidence, or did I just grow up?
I grew up in the 80's, and just faintly remember seeing SW in 1977, but I never saw Rocky I in the theater, I never saw Jaws in the theater, and grew up seeing Jaws 2 & Rocky 3 on HBO 10,000 times, and LOVED those movies at the time. But years later when I bought the movies on VHS, and watched the originals, I realized how great the originals were, even though I saw them out of order!
Now of course there will always be PT fans, but there are also Fast & The Furious Fans, so what can you do? So the young fans growing up now will see the saga of 6 movies compared to how we see the OT/PT, but that doesn't mean they won't know what the great movies are. I see the Rocky Saga as 6 movies, cause I enjoy all of them to a certain degree, but in the same vein I realize the Original Rocky is one of the greatest movies of all-time.