Sorry-my answer is NOTHING. Star Wars pasted itself right across American society in a way HP/LOTR/Avatar can never do.
Most kids I meet IRL who give a damn about such things (remarkable numbers of young people actually don't expend much emotional energy on movies and TV, you know) are not particularly interested in Star Wars
. Harry Potter
has been a much bigger deal in their lives.
is likely to have the most long-term effect on the way movies are made - perhaps closer to SW in that respect than HP is - but that's not quite what was asked.