From OXCGN:
"They need to put out a game each 2 years, which allows the a year in pre-release period to work on the future iteration, like every other normal developer does, and they SELL copies and people would buy the NEXT iteration at the same rate, making them more $$ and getting the same, if not more support from fans.
This is a slap in the face to any GT5 supporter, basically saying, well we don't care how much you might want it, you're not getting until we're ready, even if that takes 5 yrs . .and that 2010 is only a "rough time frame. What happens if they come out mid 2010 and say . . well, we've had to advance the game as the PS3 has had advances (or Sony has put the PS4 out) so we have to re-work the game or do more to it."