I mean, I think on an infinite timescale we probably will. A middle-class lifestyle today requires less energy than 20 years ago, simply because things have gotten more efficient (if you buy a fridge or a washing machine or a central heating system or a lightbulb today, it's using significantly less energy to do the same thing). But not _soon_. And part of the shift is very much from non-electric to electric power usage (gas heating -> heat pumps, petrol cars -> electric cars, diesel trains -> electric trains, etc etc). Energy use per capita will peak (may already have peaked) _long_ before electricity use per capita.
I mean, I think on an infinite timescale we probably will. A middle-class lifestyle today requires less energy than 20 years ago, simply because things have gotten more efficient (if you buy a fridge or a washing machine or a central heating system or a lightbulb today, it's using significantly less energy to do the same thing). But not _soon_. And part of the shift is very much from non-electric to electric power usage (gas heating -> heat pumps, petrol cars -> electric cars, diesel trains -> electric trains, etc etc). Energy use per capita will peak (may already have peaked) _long_ before electricity use per capita.