Nordstrom’s flagship store in downtown Seattle is currently featuring a neat little technological trick, allowing passersby to write and doodle on one of its display windows by moving their hands across the glass. The “light writing” system uses a projector in conjunction with Microsoft’s Kinect motion sensor.

It’s one of a rising number in alternative uses for the Xbox 360 accessory, a phenomenon that’s likely to accelerate when Microsoft releases a Kinect software development for Windows 7, initially for academics and hobbyists but eventually for commercial uses.

Nordstrom’s display is scheduled to be in place through April 11.

More in this this Nordstrom post. Also see this post from Microsoft’s Steve Clayton, who makes a nice observation: the display is next to a plaque for Mary Gates, the Microsoft co-founder’s late mother.