Gallery: Blade Runner, Akira, Rollerball: here's when your favourite films will disappoint you

IntroductionBack to the Future day is over; Marty McFly has left the future - and is safely ensconced, via 1885, in a 1980s nirvana where he remains untroubled by things like Google, iPhones and hipsters. For the rest of us, mourning the horrible truth that we don't have hoverboards, flying cars or Holographic advertising (even though we were promised them by the movies), we're already turning to the next sci-fi franchise to tell us what we should be looking for next.Yes, like a cult on day one