In 1999, I said that in about a decade we would see technologies such as self-driving cars and mobile phones that could answer your questions, and people criticized these predictions as unrealistic.

By 2010 computers will disappear. They'll be so small, they'll be embedded in our clothing, in our environment. Images will be written directly to our retina, providing full-immersion virtual reality, augmented real reality. We'll be interacting with virtual personalities.

There are downsides to every technology. Fire kept us warm, but also burned down our villages.

Our technology, our machines, is part of our humanity. We created them to extend ourselves, and that is what is unique about human beings.