Honestly, we won’t likely see cheap energy in our lifetimes. A fusion powerplant could come online that is able to power the entire eastern seaboard of the US with some leftover for millionths of a cent per kW and we would still be getting charged just as much if not more for it. The general populace will never see the benefits of nearly infinite, nearly free power because the company that owns it will just see it as a higher profit margin. Sure, they may underbid fossil fuels or other renewables by just enough that they can’t operate, but it will still be orders of magnitude more than we should be charged. The only way the population sees the benefit is if the reactor is publicly owned and the government is prevented from converting it over to privatization because that has ever gone well for us.