Dengeki has interviewed Tetsuya Nomura on the future of Final Fantasy VII and Final Fantasy XIII and he's revealed some more information on the development of the games.

Nomura says that with the help of the disc space on Blu-Ray and the Hard drive in each PS3, The evolution of Final Fantasy XII to XIII will be as big as the evolution of Final Fantasy VI to VII. He also says that Final Fantasy XIII will probably be the first game to use the full specifications of the Playstation 3. Another interesting thing he mentioned was that the airship present in Final Fantasy Versus XIII will be able to take part in airborne assaults over the world map. Hopefully we'll see that in action soon. Finally, Dengeki also asked him once again whether the games will be Playstation 3 exclusives which he replied to with "Of course".

Source: FF7AC Reunion