Drones (The automatic dog-walker) In a classic caper, the automatic dog-walker that appeared in BTTF 2 distracted Marty McFly for long enough to allow Biff to steal the DeLorean and travel back to 1955. It consisted of a drone attached to the dog’s collar by a lead. That drone could presumably be programmed to follow a particular route. While they’re not being used for dog walking, civilian and commercial drones are indeed becoming a common sight. It’s yet another remarkably prescient prediction from the BTTF 2 writers. Amazon is considering using drones to deliver parcels to your door as part of its Amazon Prime Air project. Drones are also being used for filming and surveillance purposes. In the film, a drone is sent by the USA Today to take photos for the paper. Returning to dog walking, an enormous robot called Luna that was unveiled by RoboDynamics in 2011 could be the answer to automatic dog-walking. The robot can also help with various tasks around the home, including walking your dog. RoboDynamics expects that there will be a robot in every home by 2021.