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Projectors, tablets, and other devices, combined with depth cameras, enable applications to span multiple 'screens.' This work enables webpages to be experienced outside of your PC monitors to take advantage of all your devices in concert. For example, a karaoke webpage could use your phone, tablet, big-screen television, and projectors to provide an awesome entertainment experience. Webpages also are enabled to ΓÇ£seeΓÇ¥ objects in the room and respond to them -- all while preserving privacy from the owner of the webpage. Such a page could show you an ad near a Red Bull can, but nobody would be able to find out how much Red Bull you drink.