Besides being a sustained and popular franchise, Star Wars
(along with two important early films directed by Steven Spielberg, Jaws
and Close Encounters of the Third Kind
) also resulted in dramatic changes to the Hollywood film industry. These films essentially created the high concept, big budget blockbuster that characterizes much of the American film industry today.
The closest thing to have an impact approaching that is probably Avatar
, concerning the (latest) rise of 3D cinema, but that technology has a long ways to go. Still, it already has changed the way movies are produced and exhibited.