This is a clever little project.  It apparently works by dispersing a relatively flat, relatively invisible spray of particles into the air, and projecting a video image on that.  They seem to go to some lengths on their web page to not talk about those little particles; which makes sense to me – it sounds like a pretty imprecise substrate for a video screen.  It sounds better to just say “it’s projected into thin air!”  Still, if it works, the marketplace may forgive the foggy nature of the technology.  The videos certainly look cool.

“Help me, Obi-wan Kenobi – you’re my only hope!”