There's an intriguing (but possibly rather misleading) article on the BBC's site about the airborne transmission of power. It talks about a technology - electromagnetic resonance - that might eventually do away with many of the cables and chargers that seem to rules our lives.
Trouble is, from what the Beeb says, it looks to us like the researchers at MIT might have missed the fact that electromagnetic resonance has long been in everyday use. So, if they've not done their homework properly, they might be wasting their time repeating research that's already documented and patented.