"Up until Bladerunner and Alien all sci-fi films were like 2001, pristine high technology, "
Unless of course you ignore Jean Luc Goddards 1965 "Alphaville" Private eye exploring the lines between humanity and inhumanity in a dystopian future anybody?, Lang's "Metropolis" or Ubaldo Ragona and Sidney Salkow's "last man on Earth". Oh and dont forget Orwell's "1984", which had it's first cinematic release in 1954. Any other number of film noir/science fiction crossovers from the fifties.
Imho:)
it's not bad film, but I think Scott's "The Duellists" is a lot better.