Today seems to be a pretty big day in the (previously small) world of touch-screen devices that you don’t actually touch. Microsoft has released a demo showcasing a technology called Touchless which allows an everyday webcam to emulate the functionality of an expensive multi-touch screen. They’ve also released an SDK for Touchless, allowing developers to start creating their own sorta-multi-touch apps.

Mike Wasserman, the creator of the Touchless, has released a video demonstrating the technology in action. The technique involves using the webcam to track the position of “markers” manipulated in the air or on the surface. In the video, Mike uses all sorts of things as markers, including stuffed toys and a lollipop, which makes it seem like anything sufficiently colorful can be used. The video shows off how Touchless can be used to manipulate photos, draw, and play some rudimentary multi-touch games like 4-player Pong.So far, Touchless is just a neat demonstration of an idea. With the SDK released, though, we might see some very cool things built on the technology in the future.

Check out the video or try the demo for yourself and let us know what you think.