In his documentary of last year, Steve Jobs: The Man in the Machine, Alex Gibney analysed the worldwide outpouring of grief that followed the death of the tech guru in 2011. It seemed remarkable that so many people were in tears for a man they'd never met. "I think we were weeping for the loss of future products," was Gibney's diagnosis.

For better or worse, Steve Jobs, who took Apple from the brink of bankruptcy and made it into the most successful company in the world, has become an icon of our age. Since his death there have been at least six documentaries and two feature films. Jobs (2013) by Joshua Michael Stern, with Ashton Kutcher in the title role, was a clumsy, schematic affair. Danny Boyle's Steve Jobs, with a script by Aaron Sorkin and Michael Fassbender playing the lead, is as much of an advance on the previous model as the iPad was on the Newton.