We've seen lawnmower robots, and snow-blowing robots, but never one that can do both. That's the promise of the Yarbo Modular Yard Robot. It consists of a motorized, rubber-tracked base unit that can be equipped with three different modules. One mows grass, with a cutting width of 20", one can clear snow up to 12" deep and throw it up to 40 feet, and one can clear leaves with a 119mph blast of air. It uses radar and a camera to avoid obstacles and GPS for positioning, so it doesn't require running boundary wires, and has a battery that recharges wirelessly via a docking station and can also serve as a portable power station.