Charging devices over the air is not a new concept, and there have been many attempts at it. The biggest knock on solutions thus far is that it is not an efficient use of energy. Either way, I believe this sector is poised to find a household solution sooner than later.
UBeam recently put on a demo of their latest creation that will let gadget owners power up their devices over the air, without ever plugging into an electric charger or any kind of docking station.
You can see the demo in the video below. The video also does a great job of explaining exactly how emitting power “over the air” to charge devices work.