Because if you can power a fridge this way, you can power an automobile this way. They won't let this happen. The current power structures in the world (petrod

Because if you can power a fridge this way, you can power an automobile this way. They won't let this happen. The current power structures in the world (petrodollar, etc) and world economy as a whole (massive employment within oil industry and throughout supply chains catering to oil industry) are too intertwined with the oil industry to allow any other technologies to swiftly disrupt that.