Augmented Reality (AR) represents the next stage in high tech environmental interaction.  Whereas VR creates an enclosed virtual environment, AR represents a fusion of virtual and real world space called mixed reality.  AR requires a device with a camera whereby a virtual object is displayed as though it were in the space the camera is viewing.  

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The example on the right represents a retro 70s sci fi hologram, featuring my daughter dancing.  The visual is set to appear and lock-into place with a one dollar bill.  While the dollar moves the image continues to track on top of it.