Really rather cool, and to anyone who built a theremin is even more impressive, considering their accuracy in the video.

One of my biggest complains about tablets and smart phones, is many websites still expect a mouse, the backwards compatibility isn't there. Push and hold for right click, but what about mouse over, mouse enter etc.

That is one of the reasons I love the surface touch cover, because it gives me a way of browsing these legacy websites (sadly often Flash).

But speculation based on APIs on Windows Phone, suggests this might be coming with the new gen flagships.