'Frankly it blew my mind': how Tron changed cinema – and predicted the future of tech

Back in 1982, computers meant one of two things in the popular imagination. Either they were room-sized machines used by the military-industrial complex to crunch data on stuff like nuclear wars and stock markets, or they were fridge-sized arcade games such as Space Invaders and Pac-Man. Kraftwerk were singing about home computers, but if you owned one at all, it was probably a Sinclair ZX81, which was only marginally more sophisticated than a calculator. And yet, that summer, cinemagoers were catapulted into the digital future. Few appreciated it at the time but with 40 years' hindsight, Steven Lisberger's sci-fi adventure Tron was the shape of things to come: in cinema, in real life, and in virtual life.