Since the creation of modern cinema, there has been a movie or series of movies that defined a generation. For George Lucas and Steven Spielberg, it was the Flash Gordon-style movie serials. For my generation it was, you guessed it, Star Wars. Now this generation's 'defining cultural epic' is the Harry Potter films and books. It will be interesting and amusing to see where the next one comes from.
Hopefully, it won't be High School Musical.
:-S