Jim Campbell's 'Scattered Light' :: Digital + Physical = more Magical.

Read a nice long serious article about this installation: http://goo.gl/mXbNL

I've seen much position-scanning, mirror-effecting, interactive-ness recently.
And this has absolutely stayed in my mind as the most magical because I think the principle is at its most mundane and graspable when it involves simple day to day things (see the bureau as well).