Dyson's big, heavy, complicated robot vacuum that never was
 

Introduced to the public way back in 2004, Dyson's first robot vacuum never wheeled itself into retail. While it was apparently close enough to a finished product to pick up a sticker with a helpline number, the sheer number of sensors (over 70), a...

http://www.engadget.com/2015/10/23/d...hat-never-was/