Listen now (37 mins) | There's fast AI and there's slow AI. Fast AI is the one that's going to cure cancer by the end of this year and get us to Mars by the middle of the next one. Or maybe not, for hype tends to be decades ahead of substance. Slow AI, on the other hand, is about a generational shift in the use of technology, one that will take at least a couple of years to make an impact and a decade or more to become universal. That's what happened with mobile telephony and before that, the internet.