Some people may have different taste in games than you and possibly do not want to go back and play old games. To tell you the truth all things collect dust when sitting there for a while even if played. For instance I could say that my TV is sitting there collecting dust even though it is on for most parts of the day.
End of 2009 sales predictions:
PS3 - 33 Million 360 - 40 Million Wii - 75 Million