Vacuum cleaners used to be boring devices that we had to push and drag around the house to collect dust bunnies and other flotsam and jetsam from our floors. But over recent years they've gotten smarter and can now clean our floors with out us even being at home. The Ecovacs Deebot 900 is a robotic floor cleaner that wanders around your home collecting the bits and pieces that hit the floor. Here's how it performed at my place.