Bill Gates says he won’t live to see the day when computers think and act like people because the human brain is too complex to be compared to the logic gates and micro-circuitry of a computer chip.

In contrast, Ray Kurzweil predicts that a $1,000 computer in 2019 will have computational ability that roughly matches the human brain.

Microsoft is doing AI research, though, in more natural ways to communicate with computers, including handwriting recognition and gesture control.