Of the whole 2 hours of his showcase of many different AI technologies, this 10 minutes scares me the most. The implication is that robots doesn't need the physical world to learn. They can learn doing things extremely fast in their own virtual world. So in the coming years robots can learn to do all kind of physical work in a rapid pace. Many of our low-paying jobs will be replaced by robots soon. Not a bright future for a lot of us, and it's happening much faster than Most of us expected.