Guys these aren't new, Friendly Robotics has had one for several years. There are like 2-3 other companies out there making these types of mowers as well. As far as being stolen, well they have anti-theft deterrents which make them worthless if stolen. Granted I am sure someone could by-pass that, but at a minimum it's a deterrent. As far as being "GREEN" yea I am tired of the usage as well, but when compared to a gas mower, elec used to charge these things has less of an impact on the environment than gas mowers do. With all this info you would think I owned one, well I don't but will buy one when my Riding Mower goes out. Why? Cause I hate mowing the lawn.