As reported by an eccentric philanthropist in his Twitter, web camera, fitted as standard in the Model 3, is the idea of the future, designed to contribute to security in the event of use of the machine to auxiliary drive.
We are talking about using the car as robotaxi that without the intervention of the driver and owner could carry passengers. Mentioned camera must record their behavior and in case of problems if, for example, an emergency situation to serve as material evidence.
In the future the camera can also act as a helper that automatically detects people using a car to automatically adapt the configuration of seats and air conditioning to their needs.
However, at the moment the camera is inactive and is only a symbol of the ambitious plans for the future.