That only proves the point of the article: Mobile is still bad and has fundamental barriers to overcome. In the 1980's, the "obsolete the moment you buy it" and "expensive paperweight" jokes were commonly encountered for PC's.

The nature of what will cross those barriers is still up in the air, though: It could be plugging the phone into a dock to access the traditional peripherals; it could be used in tandem with a novel display technology like a VR headset, and likewise use novel interaction methods. The market hasn't started proposing serious solutions yet.