I agree with the author for the most part, too...
PS are going to rapidly lose market share and eventually, all but go away. It's inevitable. Most people, even those who carry a PS now, are more than willing to give up some of the control options on a PS, in order to eliminate a device in their pockets. We're rapidly moving towards one device that will handle multiple things. Maybe not as well as their individual counterparts, but again, most people will be fine with that in order to carry one device. (I know I am!) I don't want to carry a wallet anymore either. So, with a new phone, I can eliminate my iPod, laptop, wallet, camera, etc... from my daily routine.
If I was selling PS cameras, I'd be really nervous right now.