For energy:
- if it's a bad thing, e.g. nuclear power, it's "megawatts" or "gigawatts"
- if it's a good thing, it's "powering N homes"
I've occasionally seen energy measured in "fully loaded 747s coming in to land"
That's not true at all.
Usage recorded by the electricity meter will go up, yes, but usage recorded at the gas meter will go down. And net, the newer approaches use less power than the older ones.
The one technical exception is the car, whose power requirement was previously not captured by the home's consumption. But including that, on a household basis power consumption should drop.