You don't know what someone's going to walk away from a movie with but you hope it's something positive but if nothing you want them most basically to be entertained and engaged. That's your job. But you also hope to give them something to chew on or maybe some insight into the human existence you hope a little bit. Not to sound too lofty.
The truth is that we live out our lives putting off all that can be put off perhaps we all know deep down that we are immortal and that sooner or later all men will do and know all things.