Kinect & Pufferfish Eye of Sauron
I have to admit, the initial draw was the Eye of Sauron but the technology within also fascinates. To achieve this marvel you need a PC, a Microsoft Kinect and a Puffersphere.
In order to get the effect on the Puffersphere you take a panoramic image and subject it to polar distortion to create a form that the lens of the projector within can display on the inner walls of the sphere. Visit the Technology Studio website for a more in-depth discussion, but watch the video first--it's very cool.