I think this article is a little misguided. Sure, commodity products such as Duracell or cheap clothing companies might be in trouble, but such companies were weak brands in the first place. Their main appeal was low cost, good enough, and Amazon is just doing the whole low cost, good enough thing better than anyone. But high end brands like Apple, Nike, Louis Vuitton, Gucci, are not going anywhere, that's for sure!
I'm fairly sure it's the latter.