Heat pumps in particular are getting a push from "green" initiatives because they only use electricity for fuel which can potentially be supplied by "renewable" sources.
ie; it's a buzz word.
It may not be as green as pure electric can be in theory, but in large portions of this country electric isn't all that green either.
Heat pumps appear expensive to operate. Imagine running your AC year-round... that very thought makes many-a-homeowner shudder.
It's a niche, I give you that, and the plate can only be used with specific sized woks, but they exist.
I've seen induction cooktops in commercial kitchens before, maybe they were just being stupid?
They also can operate at >100% efficiency. Under the right conditions (I'll let someone who knows more about it fill that in) they can provide more heat than the same amount of power going into a resistive heater (which is I think per-se 100% efficient right?). Kinda wild.
But yes, mechanical might be up to 600% efficient depending on how you think about it as moving heat around based on energy usage per therm delivered inside the home is really what people are looking for.
That's lab figures though so I guess similar to car efficiency figures.