Electric vehicles are really the best option IMO - as long as it’s fully charged in the morning when it’s needed, most drivers won’t care if it charges at 9pm or 3am.

I’m less certain about the other things - not many people will eg. put off a load of laundry to a less-convenient time to save 21 cents. And if my partner is too hot because the heater has been running for 30 minutes I really do not want to have a discussion with her about “thermal storage” :)