Let's take optimistic assumptions: 50 watts used by a laptop, ~4 hours a day, plugged in and used every day of the year, one laptop per an American, 300M people

Let's take optimistic assumptions: 50 watts used by a laptop, ~4 hours a day, plugged in and used every day of the year, one laptop per an American, 300M people. All of that multiplies up to 4 * 365 * 50 * 3e+8 = 2.19e+13 watt hours = 2.19e+10 kilowatt hours affected per year. United States uses about 4.1e+12 kilowatt hours per year, that would have an impact of ~1%. Realistically it would probably be 10-100x less. Although it does seem easy to deploy at scale, at least in the future models.