A few months ago MIT's Technology Review (http://www.technologyreview.com/communications/22764/ http://www.technologyreview.com/communications/22764/) said this

A few months ago MIT's Technology Review (http://www.technologyreview.com/communications/22764/ http://www.technologyreview.com/communications/22764/) said this could be in the market in 3-5 years, so it makes sense to see a product testing the waters and reaching out for early adopters at this point.