In a way, the article contests the idea that Casual Games are necessarily *the* future of games. Although I enjoy casual games (specially for their cost of production), and try to keep in mind casual audiences, I cannot help thinking that "hardcore is the new casual" - something Manifesto! Games might eventually prove.
Also, a particular passage from the text intrigued me:
"Over on the PC gaming side, for several years now, Web games such as Yahoo!'s gaming service have done extremely well, and EA's The Sims franchise has been a long-time staple for that company."
Yes, most casual players enjoy The Sims, but I would not say it is a casual game, would you? It has quite complex rules and interaction schemes, massive interface, it takes time to learn and play... Just because casual audiences enjoy it (mostly, I believe, for the content - which they also can create), it doesn't mean it's a casual game. Maybe it's casual hardcore. Or vice-versa.