

The ability to have smart cars that improve fuel efficiency by adjusting to traffic conditions may very well compensate for the increased electricity demand created by data centers.
That just reads mindblowingly stupid for me after only one semester of the “automatic guidance of trains” subject with a few simple methods of numeric optimization. And I wasn’t studying very well, to say the least.
The rest of what you write feels as if you’d missed the whole “digital computer” thing and what it already allows us to do since 1970s and that is being done since 1970s.

That might be logical in some situations. Where there’s surplus in the grid and it plays the role of amortizer of what you give it. They can’t just shut you off when they are getting too much load. Or they can but prefer to have a soft curve where you get less and less until you start paying for what you give.
Like water is a resource, but you do pay for water disposal (that is, I live in Russia, and there’s a separate line on the bill for what goes into sewers), or, if someone provides passive cooling service somewhere, you might pay for the heat you give away. Even if that’s energy.