It’ll go a long way towards having sizable battery capacity with an electrified vehicle fleet. But there’s also just building out electrical capacity. The industrial revolution and onward is also a story of humanity having much more access and usage for energy per capita than ever. If energy costs are low enough then direct air capture of carbon becomes a “sure, why not,” for instance. Major power infrastructure was built solely to unlock aluminum when the uses for it were discovered. Energy production capacity never dreamt of before that point.

In Germany there is already an obligation to cover roofs of new storage spaces with solar. If I’m not mistaken.