Is it a gimmick (I dunno)? Their apparent goal, a more robust and less finicky alternative to front-derailleurs, seems pretty much in tune with what you want...
> It's a market designed around either enthusiasts...or parents...
Look outside the U.S. for very different approaches, e.g. Japan, where bikes are ridden by everybody (bike mode-share is an order of magnitude greater than even bike-friendly cities in the U.S., and far more evenly distributed amongst sub-populations), and generally not fetishized (there's an enthusiast market, but it's very small by comparison).
I agree that the U.S. market historically resembles your description, but that's started to change in recent years as the overwhelming obsession with automobiles has cooled, and we start to enter the "post auto age" (very slowly in the U.S. of course!). American biking culture is still very influenced by older patterns, but this is changing too.
Electric bikes are a somewhat popular niche lately, but there's absolutely no chance they account for anywhere even near 30% of the bikes in use in Tokyo. The number of bikes, and biking population, in/around Tokyo is immense, and the vast majority of them are not electric (nor new, nor particularly fancy). Even amongst the recently popular small-wheel-two-kid-seat bikes, most don't seem to be electric.
But you're absolutely right that the Japanese bike market would be a good one to target; it's very big, more upscale than many other countries, and oriented around practicality.
I'm a commuter by bike. I want something that can still work after driving it through winter without constant maintenance. But the only thing coming out of that industry is gimmicks. It's a market designed around either enthusiasts that spend every second refining their subtle creations, never getting to ride them, or parents who need a cheap bike for their kids to demolish and consume.