Of course it won't be for everyone. O Scale isn't either.
But all you have to do is look at kid's toys - cars and trucks that not only have speed control but also proportional steering, and note that you get motor, servos, RC equipment, and maybe the first set of batteries for under $40. Not to mention the model itself. Of course they do have economies of scale.
That tells me that this little niche of the O Scale hobby could easily take off now, with current technology. I expect it within two years.