Eh, I didn't care about cars until I was in my 20s, but before then I wasn't in the market for expensive cars anyway. Kids not being into cars is not the end of the world.
Yea, wait until they get a job and have to figure out how to get to work. Then (assuming they live in 99% of the USA), all of a sudden, having a car is going to be pretty important. I wouldn't draw any conclusions if kids under 20 don't care about cars. Like E-mail, they'll suddenly start using it as soon as they get their first job.
But will they care about them? The article acknowledges the utility aspect, but that doesn't mean they will form an emotional bond with it, as previous generations have. If so, then it will be a difficult future for the automakers who play on that aspect.
50% of the US population lives in big urban areas. In those places it is not all necessary to own a car to get to and from work. Indeed, in places like San Francisco, New York and Boston, owning a car can be more hassle then help.