The original robot vacuum company showed off a concept robot at the IFA tech show in Berlin today. The Roomba Duo combines a heavy-duty floor-washing machine with a smaller, slimmer Roomba. The two floor cleaners can move around your home together, with the main unit mopping and sweeping larger floor areas and the smaller unit lowering mechanically when needed to clean tighter spaces, such as under tables or in corners.
The Duo is also an autonomous mobile dock, with clean and dirty water…
