Well, they figured out how to make invisibility cloaks (though it’s a long way off) in theory… now they turned their minds to levitation, and solved that, too. How long did we go from E=MC^2 to the atomic bomb? Yeah, about that long from practical levitation for very small devices.
(Yes, I understand the Casmir effect has a range in tens of nanometers. Still doesn’t mean it’s not cool though.)
One thing that gets very, very interesting to me is the presence of “virtual particles”, indicators that Nature relies on evolution to figure out the interaction of matter at even the most basic level. Very cool stuff. For a better description of the process involved, see http://www.st-andrews.ac.uk/~ulf/levitation.html .