Behind the meter solar + battery will cost less than transmission upgrades to meet electrification needs very soon. It will be the plurality if not the majority of energy in the areas where 90% of the people live. Not only covering the overwhelming majority of home and low rise commercial energy and heating, small scale agriculture, private transport and light commercial transport but also exporting enough during summer to feed a big part of non-time-critical industrial usage like electrolysers for chemical feedstock. This will be over half of world energy.

Energy that doesn't pass through a single floor or low rise building at some point (ie. Heavy transport, high rise commercial, heavy industrial) will probably not have micro generation as a major component but more as an opportunistic suppliment.