From Dan Farber's article, "A look into the mind-bending Google Glass of 2029" at C|Net:
Ray Kurzweil, Google's director of engineering, calls Glass a "solid first step" along the road to computers that rival and then exceed human intelligence. Kurzweil, who is also an accomplished inventor and futurist, predicts that by 2029 computers will match human intelligence, and nanobots inhabiting our brains will create immersive virtual reality environments from within our nervous systems:
If you want to go into virtual reality the nanobots shut down the signals coming from your real senses and replace them with the signals that your brain would be receiving if you were actually in the virtual environment. So this will provide full-immersion virtual reality incorporating all of the senses. You will have a body in these virtual-reality environments that you can control just like your real body, but it does not need to be the same body that you have in real reality. We'll be able to interact with people in any way in these virtual-reality environments. That will replace most travel, but we'll also have new travel technologies for our real bodies using nanotechnology.
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