It's somewhat clear that were headed for a bit of a downturn, but this article reeks of the "everything that could be invented has been invented" fallacy.
I think it is also kind of missing that you can't easily draw parallels with the past here, as the field we are mostly talking about – software making, I think – is the first(?) modern big industry field where the means of production are in the hand of the workers. You can't easily compete with car companies, cause most of us won't have the means to even produce a prototype. But nothing is stopping someone capable enough from building his own OS, for example. And yeah, then we come to the forces of design and market share, but still – this is fairly new and distinct.