That is exactly what Nikola Tesla was working on a hundred years ago. His lab in Long Island, New York (which he called "Wardenclyffe") had a tower built out behind it which, Tesla hoped, could be used to transmit radio signals and free, wireless electricity for everyone. However, when his sponsors found out it would be free, and that they wouldn't get any profit from it, they cut the funding and the place fell into disrepair. The idea of wireless electricity has been around for well over a century, but no practical means has yet been discovered. As said before, it's just too inefficient.