Question for ps3 games

[Gamekid]

What is DVD 9? Standard DVD? I haven't heard a thing about Grand Theft Auto 4 except that supposely 150 developers will be working on it. I think that Rockstar will make the game since they created the series in the first place. I do wonder if Grand Theft Auto will be out on the XBox 360 because the ps3 is the only console that can hold a 50GB disc so if you make a next gen grand theft auto game, you have two options: 1) Put Grand Theft Auto out only on the ps3 since blu-ray is not on the XBox 360 or 2) maybe make Grand Theft Auto on the ps3 and then somehow make a stripped down versions and put that on the XBox 360. I did read that Grand Theft Auto 4 would be out on the XBox 360 first so maybe the game will be out on both consoles.