Parts

• Display
  Shows the visuals. Preferably:
  • Stereoscopic
  • Panoramic
  • Viewer-centered perspective
  
  
• Audio
  Plays dynamically generated sounds.
  
  
• Tracking
  Tells the system where the viewer is. Allows direct interaction (pointing, touching, grabbing, etc).
  
  
• Control
  Provides commands or other user input.
  
  
• Computer(s)
  Puts it all together. Takes input from tracking & controls, performs real-time simulations, generates graphical & audio output.