What will matter more to developers than content will be money. The N64 carts didn't just have small capacity. Since Nintendo made made the carts, developers had most of the monetary risk, and little reward of their own. It was better than the NES era, but still unacceptable. And since Sony only charged a minimal licesning fee for PS1 development, it was obviously much better. So it was money that was the main reason developers took to a format. This is not bashing in any way. It's business, and Nintendo was guilty then of screwing over others' for the sake of theirs.
The point is that if the games sell well enough, and God of War II shows that multi-disc games still sell well, then developers will just work with multiple discs on the 360 if they have to, because they will still get plenty of money.
A flashy-first game is awesome when it comes out. A great-first game is awesome forever.
Plus, just for the hell of it: Kelly Brook at the 2008 BAFTAs








