Earlier quoted context omitted.
The only thing you would have to do to make this happen is to change electricity pricing from a fixed rate to a dynamic rate based on actual market conditions, along with a standardized way of accessing current pricing. This would drive consumers to shift their behaviors to take advantage of cheap prices, and smart appliances could access the price feed to make decisions like the ones you mention. Another simple one…
Even if such a system was set up, it would take years before the appliances where all updated to take advantage of it. And in the meantime it would be very unpopular for people who can't just afford to renew their otherwise fully functional appliances.
I agree on the popularity, but you'd absolutely see an effect even without anyone buying new appliances