SenseSurface “…allows you to attach real, physical knobs to a flat-panel display. The magnetic knobs are measured by a sensor plate in the rear, letting you turn the knob itself to control the software dials. Sounds like a great way to do synth emulators!”
Thanks to @solidsmack for the heads up on this story at BoingBoing. I could see this combined with RFID tags in the knobs, so that as you attach different knobs, the interaction area changes to different controls. While it may not be more efficient or productive for a workstation situation, I think the gains in usability and intuition in a public setting are through the roof. Very cool application of technology to the realm of user interfaces.