Over here in Europe a better question is whether there will be any electricity to run hi-fi and homes once hundreds of millions of electric cars have taken it all.
Here in sleepy UK we haven't completed a large new power station for more than 25 years and we have to buy electricity every year from France. Who threatened to cut off Jersey (a small British island near their coast) last year.
As to noise on the public electric line, has anyone thought of using a mains powered electric generator to drive the hi-fi? No noise enters the system from the public line and no pollution/noise from a ICE generator. Think of all the money you'd save on tweak power cords/fuses/conditioners/etc.

