Here's my take on the so-called 'hardcore' vs 'casual' argument.
I'd say there are definitely people who are more into games than others. For instance, my parents own a Wii and a DS plus quite a few games, but they don't play as much as I do and they definitely don't go in search of news and read about the industry the way I do.
I have five systems currently hooked up in my house, plus DS, PSP and an iPod touch. I read GAF daily as well as books on the history of the industry.
However, I still don't have an HD system even though I have two HDTVs, and I don't play FPS games or GTA type games at all. I have no interest in Call of Duty, but I love Kirby's Epic Yarn. I'm *seriously* into games, I just don't play many of them that people would usually assign to a 'core' gamer.
So, I think there are different categories of gamers, but not necessarily games.
If someone plays nothing but an occasional game of COD, that would be pretty casual. If someone plays Peggle day and night and frequents Peggle message boards, that's pretty hardcore.
Back to your regularly scheduled speculation.