Vacuums have come a long way. You no longer have to suffer the indignity of dragging around an unwieldy plastic hose connected to a clumsy, wheeled canister the size of a Galapagos tortoise. In fact, you don’t even need to get off of the couch. There are many good robot vacuums available to help you dispose of dust, pet hair, and other debris in your home—without needing to lift a...