the future is mini-grids....less transmission (including some wireless), and yes, even some renewables (like hydro) which can be immediately profitable with bitcoin mining at the point of production, and continuing advances in storage
the same old motivations will govern how quickly the future comes to us....supply and demand, profit, etc.
sadly, the more government distorts markets, the less sustainable development there will be
Decentralization, subsidiarity, local control. Is it any wonder that the political "scientists" are pushing a world grid to head that off?