Peter Debruge Chief Film CriticWe’ve come a long way since Disney released “Tron” 39 years ago — so far, in fact, that some people actually buy into the theory that what we think of as existence could be just a giant computer simulation, as Elon Musk described at Code Conference in 2016: “Forty years ago we had ‘Pong,’ like two rectangles and a dot. That was what games were.