I'd also make the assertion that the article fails to account for people like my co-workers, who are not millennials and use Car2Go more often than anyone else I know. Parking is absurdly expensive where I work, so people use Car2Go to avoid that. I used it to get to school until I was able to purchase a car of my own, at which point the costs shot down dramatically and I now have a secure asset -- as you pointed out. It made way more sense to own -- and still does. Perhaps as these businesses grow, they will be able to rival the prices of ownership and offset the downsides of not having a secure asset. If that happens, I will certainly reconsider owning.
That being said, I do feel that a lot more people in my generation are less inclined to desire a thing because of the status it assigns you. Perhaps I'm just an out of touch dreamer though.