Imagine a cell phone charger that recharges your phone remotely without even knowing where it is; a device that targets and destroys tumors, wherever they are in the body; or a security field that can disable electronics, even a listening device hiding in a prosthetic toe, without knowing where it is….

Read more at: http://phys.org/news/2013-02-reversal-doors-future.html#jCp and http://prl.aps.org/abstract/PRL/v110/i6/e063902