The arc mouse is a mouse that can be moved freely along the curves of a lap, therefore eliminating the need for a table. The mouse was designed for busy office workers who commute a lot but hate using the track pad on laptop. The mouse can be used even where there is no flat surface. The curved ergonomics makes it possible for you to grip it well and use it on surfaces that may not be flat. Too bad it is still a concept now…Just love this curved ergonomic mouse! [source]