Here is a robot that can keep your smartphone camera focused on you as you move. MOTUS automatically tracks users 50x a second and zooms. It can be used inside and out. You can wear the tracker around your neck or put it in your pocket. Two MOTUS units can be used to follow one TAG.
The device has silent motors and smooth pan/tilt functionality. It can charge your phone while keeping you in frame. iPhone and Android smartphones are supported.