The thing a lot of posters in this thread don't realize is they are saying they want better graphics, more advanced AI, more poly's, etc. The thing is while you could see a somewhat good sized jump in that area development costs will also rise. In other words if next gen were to start in the next two years you make be looking at $70-$80 new games. Do you really want that? Sure CGI type graphic may be possible in terms of the most advance current hardware but is it worth the cost? To me no way.
We don't need next-gen consoles till 2014 at the earliest IMO anything earlier and it simply will fail at retail. Most people are just now enjoying the switch over to HD and you aren't going to get the mass market to jump on board new hardware for only a 25% graphics boost for the cost that would entail. This is going to continue to be a loooooong generation mark my words.







