Having let slip themselves that the game will support the PlayStation Move peripheral, it seems Sony’s decision to implement motion controls into Gran Turismo 5 is the reason for the game’s lengthy delay
https://lastchance.cc/gran-turismo-5-on-the-move-5493293%3C/a%3E%3C/p%3E
According to a “source close to Sony”, trade site MCV reports that a decision by Sony to put both motion controls and 3D – which we thought they already had – into the final version of game is the reason Gran Turismo 5, which should already be out by now, is not.
https://lastchance.cc/playing-gran-turismo-5-at-ces-in-3d-5444025%3C/a%3E%3C/p%3E
So, there’s a good chance that what you just read above, you’ll be reading again in a few weeks time!
