Virtual camera system are used in movies.
 This type of camera system was very common in early 3D games such as Crash Bandicoot or Tomb Raider since it is very simple to implement
  The Walkthrough Project at the University of North Carolina at Chapel Hill produced a number of physical input devices for virtual camera view control including dual three-axis joysticks and a billiard-ball shaped prop known as the UNC Eyeball that featured an embedded six-degree of freedom motion tracker and a digital button

