I see them at every "Target" my wife drags me through... I don't know if they're in stock but they have a display around the corner from the PS3 and XBOX. I've seen folks play all of them. (I've never seen one get loose;) )
The PS3 makes me sick to watch.... too much sweeping the camera around. I liked the XBOX for college football. The WII looked interesting but more for kids. However, I've only seen middle-40's men and a 50+ woman looking at them. I don't know if it's for themselves or for their kids... or both!
I'm not a gamer at all but I find the whole industry fascinating. I look at it as a simple computer program that requires a series of button pressing combinations to get to a new map that requires a different set of button presses. There seem to be only about 4 map/game styles, auto-related, fight-related, sports-related, and D&D-ish games. I played each of the 4 and got bored in about 5-15 minutes. Yet folks really get into them and they'll play for hours! I have friends the play 'Tribes' and really get into it. I have one friend that keeps asking me to buy an XBOX so we can play shooting games together... But we can go the gun range any time and do the real thing!
Sorry for the essay on why I don't get games but will stay interested in why people do for a long time.