The day I got my Roomba 400 series years ago I have been wondering why Dyson hadn't done this? I wasn't just wondering, I wished Dyson would do it. The uphill running water was great, but James, please get back to the robot work. And he did. Sixteen years is how long Britian's greatest living inventor says he's been working on a Dyson Robotic Vacuum cleaner. 100,000 hours of work; sweat and tears also I imagine, but as ever with Dyson within the R&D, the hard work, test, failure and re-test lay the spark of innovation that makes Dyson different. Sixteen years. It appears, it was worth the wait.