Go to 1:56, and it appears that the work surface is the actual display system while the removable squares are program triggers.
It looks cool, but it's not obvious that it's really radical. The monitor screen has pre-configured mount points which position program cards. The cards possibly don't have actually have a program, but indicate to the screen what program to run and at what location. They may be touch-sensitive, or maybe they are thin enough that they pass the pressure to the actual display / work screen. If so, then drag & drop is nothing more than what is already common.
Neat demo, clever interface. But I need more details to be impressed in a "paradigm shift" way.