Answering a question on the impact of VR on transport of the future at Vanity Fair's New Establishment Summit, Musk's response was "Maybe we're in a simulation right now". The audience thought that was pretty funny, before they realised he was being dead serious.
He went on: "From what I've heard of Oculus Rift and some of the other immersive technologies, it's quite transformative, you really feel like you're there. And when you come out of it, it feels like reality isn't real. So I think we'll see less physical movement in the future as a result of the virtual reality stuff."