This robovac has an arm — and legs, too This robot vacuum from Dreame has a robotic arm that can pick up items and use tools from its toolbox (pictured in the background) to clean more areas of your home. | Image: The VergeI’ll see your arm and raise you an arm and two legs. It was the battle of the bots on the CES show floor as robot vacuum manufacturers Dreame and Roborock each adde…