Why not free energy?  We have the tech, and this would free Us from any grid of any sort.  And allow flying cars and floating cities while We're at it.

And...  Eliminate the need to account for Our energy added into a system.  Stripping the moneyed psychopaths in control on Our planet of Their tool to power.  (Money.)

And...  That energy is already sitting in the aether, not "created out of nothing."
 
Electrogravitics – My Knowledge of Free Energy  (article):  @amaterasusolar/electrogravitics-my-knowledge-of-free-energy