Gel-Based Super-Roomba Concept Is Improbable And Amazing

I would like to live in the future where a sticky Roomba army is doing all the dusting. Let's just say this up front: this design concept, for a Roomba-like vacuum army, is pretty out-there. But, man, I want to believe. The idea, from Korean designer Juan Lee, is for a set of eight remote-controlled balls that roll around your house. The balls are stored in a dust bucket that's covered in a layer of gel, and when the balls are released, they wrap themselves in some of the gel. The balls then rol...