The only problem is that electricity doesn't just fall from the sky. And that's the main problem with all the eco maniacs and fanatics. They apparently all think electricity is generated by magic pixies. There are still loads of gas and coal power plants, nuclear reactors and even renewable resources like hydro energy doesn't come with its price tag. Hydro power plant dams also alter ecosystems significantly even though they don't directly polute them. Besides, what they invented is basically a cordless tram and many cities still use buses that run on wires (i remember i've seen them in Budapest, Hungary few years ago). All they did was move the wires from above into the ground. Interesting but not all that new... it's just that technology matured enough to do it now.