A BBC News article states that Gates
predicted that the keyboard and mouse would gradually give way to more intuitive and natural technologies.
In particular, he said, touch, vision and speech interfaces would become increasingly important. Mr Gates made his comments whilst answering questions from BBC News website readers. "This whole idea of what I call natural user interface is really redefining the experience," he said.
"We're adding the ability to touch and directly manipulate, we're adding vision so the computer can see what you're doing, we're adding the pen, we're adding speech," he told BBC News.
During the interview Mr Gates showed off the Microsoft Surface computer, a large table like machine with a multi-touch interface.
Read in full - ' Gates hails age of digital senses'