Stylus interface with dynamic, pressure sensitive, controls

Couple of guys in University of Toronto have come up with prototype for pen (stylus) driven computers/displays. It utilizes the usually untapped resource of pen pressure as part of input system. The great thing about stylus pressure is that it’s analog input, meaning that you can have “infitine” (at least when compared to digital) amount of different levels. In the video they use it for fluid zooming, video track control and dynamic controls. I personally loved the zooming eyedrop tool. Why doesn’t my Photoshop do that?
Video in the full post, head on.