'Enthusiast' is the new 'hard core'. All in all I agree with the article. I really like the list of hit games in each genre being explained as simulators, seems pretty accurate.
I'm not quite sure about the new 'casual' explanation though. Aren't all games played in our spare time? Even 'enthusiasts' (such as myself) don't play games when they don't have time to spare, it seems weird.
A true casual gamer devotes little time in gaming and thus often plays games that require little time to get to the meat of the experience. A true enthusiast gamer devotes much of their time in gaming and thus can play games that require more upfront time investment. I think a casual gamer could like tough deep games but they don't necessarily have to time or care to invest the time to play these games. Much as the enthusiast gamer might not like 'shallow' games that only offer raw gameplay rather than a deep world experience but may find that deeper experience if they 'invent' it themselves through replay and competition.
There are a wide variety of gamers that fall in and in between these two categories. I would be very interested to see what the distribution looks like (a bell curve or reverse bell curve?).
*edit: refinement and adding missing words