Computers the size of blood cells will create fully immersive virtual realities by 2033, leading inventor Ray Kurzweil has predicted.
Exponential growth in processing power and the shrinking of technology would see the development of microscopic computers, he said.
"We will see a billion-fold increase in the price-performance of computers in the next 25 years," he said.
"Virtual will compete with reality," he told the Game Developers Conference.
Mr Kurzweil said it was possible to accurately predict the growth and change in computing power by looking at how it had developed over the last 50 years.
"There will be a 100,000-fold shrinking of computer technology over the next 25 years," he said.
"Today you can put a pea-sized computer inside your brain, if you have Parkinson's disease and want to replace the biological neurons that were destroyed by the disease."
the blood cell computers would be able to "produce full immersion virtual reality from inside the nervous system".
clipped from: news.bbc.co.uk 