While possible, this proposal is only practical if there is a high efficiency coupling between the transmitter and receiver. Anything else would waste the vast majority of the broadcast energy. With ordinary broadcasts the coupling is extremely loose, and all you will receive is microwatts or less. That may be enough to drive a clock, but not much else.
Tight coupling can be achieved by transmitting over very short distances, as in electric toothbrushes or the Nokia phone charger shown by Rory Alsop. Alternatively, the energy can be tightly focused to the receiver, and the receiver made large enough to intercept all of the beam.
There have been proposals to collect solar energy in space, using solar panels, and to beam it down to earth, using either lasers or microwave transmitters. In both cases the power would be tightly collimated to the receiver. A tightly focused beam is essential here, not only to ensure that no power is wasted, but also to avoid damaging structures and life outside the beam. The idea has been around for decades, but has not yet found backers. Obstacles to its implementation include safety issues, as well as the cost of launching a gigawatt space power station.
References can easily be found by googling "space energy", but here are a couple of examples: