That is something you can reasonably do, but it's only useful in winter.

> or using high power appliances more during the day

Well, given that people have to work during the day, I doubt that that will work out on a large enough scale. And even if you'd pre-program a laundry machine to run at noon, the laundry would sit and get smelly during summer until you'd get home.

The only change in patterns we will see is more base load during the night from EVs trickle-charging as more and more enter the market.