However, I don't subscribe to the theory that every story has been told.
Never said every story has been told. It's every form of storytelling that has been established and effectively scripted to create typologies that we feel familiar with. There will always be new stories within every genre.
I just don't think there's any real "innovation" as we like to imagine it. Even if there was, we're too knowledgable and jaded as a generation to not deride anything that might be new. No one is redefining or reinventing the genre in any pure way, we simply have instances and waves of narrative and stylistic changes that propel the genre, urging it to be better and somehow feel new and more exciting.
I remember when Star Wars came out and what it felt like. I was into film/tv sci-fi so it shouldn't have been anything new, but it was and it became the gateway drug that took me away from my staples of Star Trek and Doctor Who.
More importantly, I also vividly remember the first time I saw the trailer for Star Wars on our 26" wood cabinet no-remote (get up and turn the dial to change channel) TV. With no knowledge of what this film was, the trailer alone was a mind-blowing jaw-dropping curiosity experience. It made no sense at the time, but I remember being absolutely stunned and thinking I had to see what this weird crazy loud fast-paced sci-fi "thing" was.
In 1977 Star Wars wasn't so much the film itself, but the whole cultural (and marketing) shift that came with it. It happened simultaneously with the disco craze and we had loads of Star Wars disco stuff happening everywhere. My friends and I instantly became huge Star Wars fans, knew the story inside out and bought all the books, comics, magazines, trading cards, t-shirts, lunchboxes, but most of us only saw the actual film months or up to a year later. And a year later our obsession with Star Wars was supplemented with the buying of action figures.* It didn't even matter if one saw the film or not, or considered what effect it had on sci-fi cinema, it was the cultural shift/wave that we rode hard for many years. Even as kids who grew up on Star Trek, Doctor Who and other sci-fi classics, we knew Star Wars wasn't pure science fiction, but more of a sci-fi western for big screen mass audience appeal.
* Note: BTW I was the first kid in my entire school with a Star Wars action figure. I brought my Kenner Luke Skywalker to school the next day, showed it off to friends at recess and created a huge sensation in the schoolyard. A crowd of kids gathered to form the largest circle to marvel at this amazing tiny Luke in my hand. The school bully then "politely" asked if I would give it to him to keep. No, my friends fortified and insulated my circle and I never brought my figures to school again.