The reason why you'll see higher attach rates on the PS3 for GT5 is because early adapters are generally hardcore gamers, and many of those enjoy great driving/racing simulators. So it will get off to a great start, friends will see how great the game looks and with the addition of online racing, it should propel GT5 sales to a new level. Will it beat GT3 as far as sales go? Probably not, but I wouldn't be shocked to see it fairly close.
This is easily the top driving simulator/racing series of all time. They have never had a truly poor selling WW game. If 8.79 million sold by GT4 is considered a failure, i'm sure that Nintendo and MS would love to have "failures" like that. MK Wii will jump out to a quick lead, but it won't last as long as GT5 will as far as high sales go.
If this comes out in October 2008, (or later) I don't see how PS3 install base would be less then 16-20 million. And GT5 will sell systems, there really is no denying that. How many, is another question all together (talking about hardware).
My pokemon brings all the nerds to the yard. And they're like, "You wanna trade cards?" Damn right, I wanna trade cards. I'll trade this, but not my charizard.
