Gravity
Unlike Harry Potter or Godzilla, which could use old tricks and a Godzilla suit to fool the audience, the production of Gravity needed to invent new technology in order to film a movie in space.
Obviously, computers had to be used in order to create space – there’s just no way around it. But they had to invent new CGI technologies to create this kind of surroundings and make it look believable, and they ended up doing things they didn’t know computers were even capable of.