The problem I see for Sony is no FF13 or GT5 in 2007 means the other titles have to really step up, and VF5 was one of those titles.
Gundam Mousou has to start boosting sales or Sony is basically going to waste the 1st half of the year. And not just a one week boost either.
With Nintendo, the "Wii" (Music, Health, etc.) line of games is going to be just like the Training games on the DS -- Nintendo can make them very quickly with small teams and bring them out at strategic points of the year.
You just know they have several of those in development, hell they might even be sitting on a few, waiting for the Wii hardware supplies to ramp up.