Walk around in the American Heating and Refrigeration conference for a while to get a feel of these trends, this was specifically called out by many manufacturers as driven by the green movement.
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?