Forget your virtual reality googles
If you want to be in real reality, the nanobots sit there [in the brain] and do nothing, but if you want to go into virtual reality, the nanobots shut down the signals coming from my real senses, replace them with the signals I would be receiving if I were in the virtual environment, and then my brain feels as if it’s in the virtual environment.
Ray Kurzweil anticipando algo parecido a lo que anticipaba Neal Stephenson en The Diamond Age, esa oda a la nanotecnolog