A report written for U.S. electric companies was honest about the threat to their business:
One can imagine a day when battery storage technology or micro turbines could allow customers to be electric grid independent. To put this into perspective, who would have believed 10 years ago that traditional wire line telephone customers could economically “cut the cord?”
If the trend holds true, most of the cords and wires you see around you will disappear. Electric utilities may be a likely victim.