Bill Gates: Artificial intelligence will eventually make most human labor redundant, none of the things that human labor provides for the economy will be necessary for most goods and services. "My big concern is this 20-year transition period where you're going to have winners and losers and a lot of disruption." "We have to go through this to get to this period of abundance." "Humanoid robots could be two or three years away, or maybe eight years away. "We will have robots that can build houses, grow food and do surgery."