The idea is that their system can be used for quick and precise interaction with any rich semantic content. Real-world settings might include heavily trafficked places like airports or train stations, where they envision their kiosk ending up in the future. (They don't actually like the word "kiosk" -- they prefer "shared interaction space.")
A pair of German researchers have created an experimental kiosk that lets you easily use semantic Web capabilities - even if you have no idea what they are. All that is needed is an iPhone and a finger with which to drag icons around on the kiosk's touch screen.
From the Advanced Tangible Interface lab.