Here's something fairly cool: Adobe has a free browser plugin for a
Virtual Reality world where internet users can see each other. The intent
is to make websites three-dimensional. However, I note that the effect
duplicates driving a robot around on a frictional surface. The design
team is still taking suggestions. If a bunch of phys educators talked
them in to providing features like Interactive Physics, we could create
online science museums and lecture halls with "real" working
demonstrations.