In a revealing interview with Joystiq, Polyphony Digital's Kazunori Yamauchi talked about his current plans, dreams and ambitions for the potentially upcoming Gran Turismo Mobile. "Once we get GT5 out," he notes. "We hope to position it as the satellite to GT5 on PS3, GT on PSP."

Of course, making Gran Turismo 5 is no easy task, and who knows how long it'll take for the team at Polyphony to put the finishing touches on that game. Regardless, it's clear that there are some truly ambitious plans for GT when (or if) it ever comes to PSP. One idea involves being able to save replays from the PS3 and display them on the PSP. "One example would be for people to utilize replays of their race experience. Take that outside the home, whereas at home you would need the PS3, but they can take that away and share."

Another wish of the GT team is for PS3-PSP versus play. "We're just talking ideals here – but it would be nice if we were able to allow people to compete whether they're on the road or in their living room on the PS3, compete in the same race. Even though the visual qualities will be different depending on which hardware they're on it would be nice if we could allow for that. Technically, we think we should be able to."

Finally, another feature that would be added to a PSP version would be one where players don't even race the car. "Basically you're the race manager. You don't even need to steer the controller, you just set the car and let it go; you're managing it. Another example would be the PSP would be your management tool: give it input and give it instructions and the car would continue on with the race." Visit Joystiq for the complete interview.