interactive mirror

Like most people, when i came upon the title “interactive mirror” i thought it was probably some art design or wall that would reflect your image, and in a way, mirrors already do. But as i read on i was very impressed. First of all, this piece of art didnt seem very techy, as in advanced or futuristic looking with technology. It is hanging from the wall with a basket or pie looking design. As a person walks up to the mirror, the mirror literly cracks to life and their reflection almost instintaniously appear. How is this done? The mirror consists of 768 motorized C shaped prints which are assembled on a surface which uses gradual rotation in greyscale value on each C Ring to paint the persons portrait.