""""""These games will help sell consoles, but most people who already want these games have a PS3."""""
==> I higly doubt about this.
PS3 is still expensive, 400$ entry price.
Even more, with all the bad story about the console, bad games, lost of exclusives, delay, I completely understand people are not sure which console to buy : Xbox360 or PS3 (or Wii in another category of course)
Time to Work !