Handheld Projectors

http://johnnyholland.org/magazine/2009/03/multi-user-interaction-with-handheld-projectors/#more-1525

This video talks about handheld projectors that create virtual workspaces on any surface.  The virtual workspaces are no less simple or complex as current multi-user software - there is ownership, sharing, hiding, and uploading.  These projectors allow a user to project onto a wall like a flashlight, revealing what your monitor would normally reveal for you.  The handheld remote allows the user to interact with the objects.  Eventually, this will lead to 3D projections and virtual workspaces that we have seen in movies like star wars!