Anyone put any serious thought into these robotic mowers??? I don't even know if they come in commercial models, but it's sure fun to think about. The ones I've seen are battery powered mulch only machines.You bury sensors around the lawn, place the mower on the lawn and let it go. With 3 or 4 machines you could place them in the front yard move on to placing the next 3 then come back just in time to put it into the back. Initial cost of installing the sensors would be high, but who knows. Just a thought on a cold rainy winter day.