A terawatt is a trillion watts (or a billion kilowatts), so no, you're out by 3 orders of magnitude and Ethereum ceasing to use PoW would be the equivalent of l

A terawatt is a trillion watts (or a billion kilowatts), so no, you're out by 3 orders of magnitude and Ethereum ceasing to use PoW would be the equivalent of losing the need for 30-40 typical coal power plants (or a handful of the world's largest coal power plants)