Sony and Microsoft have effectively barred the gates from people buying their consoles, because they have tauted the HDTV capabilities so much, the average consumer thinks he needs an HDTV (a whole new expense factor) in order to enjoy an XBOX 360 or PS3.
Every once in awhile, a customer will try and "confirm" with me that you can't tell the difference between current and next-gen games without an HD television.
It comes in different forms but it is a perception among some uneducated casual gamers that you need an HDTV to enjoy the 360 or PS3. They're wrong of course but it is something that has been created amongst some because of all the "HD" marketing of the 360 and PS3.
[source] Around 30% of the TV owning populace have some form of HDTV now, which is not a lot. I know that one thing that has occured to me is that if I got a PS3 or XBOX 360 I would have to hook it up to an LCD computer screen, because there's no way I'm paying thousands more for something else that doesn't last as long as a computer LCD display, or a $2,000 LCD TV. And I'm not sure PS3's hook up to computer LCD's...
The Wii, meanwhile, has stayed accessible - possibly too much. Many Obsessive / Hardcore Gamers view it with distain, but others are jumping in.