There is a radio style that is powered by the signal it receives. The difference between an ambient circuit and a direct circuit is physical connectivity via wires.
An antennae is not connected to the radio station, nor is the phone connected to the other. It transmits this signal wirelessly, by electric field or signal through space. If you've ever seen one of those pieces of tape with coiled wire in it on a product you buy, that is a minute antennae. In the same way that some radios pick up power from signal, so can your electronics be designed to do so.
If you had a powerful electromagnetic field around you house and your appliances were designed to interact with this field [they are currently designed to run on direct connection circuitry, aka the plug] the appliances could run without being apparently plugged into anything. They would shake that power from the field and use it to chop veggies or run the dishwasher.
Tesla apparently had a 1930 Pierce Arrow vehicle which received 240 volts through a component in the glovebox and used that to power the engine. It got to 90 without difficulty. The power was 'beamed' to him through the em field he produced in his tower. It is like running a car on radio waves.
This is important.
Oil won't last forever. Plus it's sticky. But they use it because they can charge you for it at the pump, and they can't measure how much energy your car has used from a field. Arguably, Congress has the right to regulate this kind of interstate economic activity by its original powers in the Constitution.
You can run your car on radio waves. Yes, you can.