Using your own anology of the Ford Pinto above you prove my point. We PC gamers are the few who have taste and are willing to spend the large amount of money for the more powerful and expensive car while the rest of the world simply buys a Ford Pinto so that they can go to work in it. Gone are the days when car owners were all driving the rare and elite Model Ts, now everyone has a car but almost no one has the nice cars. Even worse, very few people make accessories, parts, or upgrades for the nice cars which causes them to become even more exclusive and niche.
You can rationalize it however you want, as a percentage of gamers we are on the decline and that means that we will be paid less and less attention by the mainstream publishers and will have to resort to third parties and niche developers to get our PC fix.
Right now you are correct, however the evolutionary path of the console can only go so far. A console is, for all intents and purposes, a PC with a dumbed down interface. They can't continue to keep making consoles better and better, they will eventually begin to evolve into what they are meant to be, a PC. Consoles have USB keyboards for sale now, practically the only difference remaining is the mouse and the distance you sit from the monitor, aside from the hardware of course.
It won't be long before the mainstream console gamers of today become more and more hardcoe, and hardcoe gaming takes a turn from the nerdy reputation it garners today, to be a normal practice. Within the next 10-20 years I see console gaming taking the pitfall, giving way to the PC.
PC's will never be useless, they are an integral part of everyone's life outside of gaming. Consoles only have games and netflix