I think Polyphony needs to strongly reconsider Gran Turismo 6. They need to at least get a version GT6 for the Playstation 4 prepared for the PS4 launch! I think Gran Turismo 6 is being launched in the completely wrong time. First the PS4 is nearing announcement, and the Xbox One was announced and Forza 5 is coming out too.
The actual sim racer audience is very small in the total console gamer audience though.