A robotic curtain doesn't exactly sound like fun, until you watch Niklas Roy's part-window-furnishings, part-installation. Described as "My little piece of privacy," the system tracks movement outside Roy's workshop window and moves a small net curtain to block the view of whoever is stood outside.
Video demo after the cut
The motivation, he says, was to provide some degree of privacy without covering the whole window altogether. Unfortunately, the end result has been to attract even more attention, since now people are coming over specifically to make the curtain dance around.
If you'd like to try it yourself, he's made all the schematics and motion-tracking code available for download.