On the 360 and the PS3...almost 2/3 of the games on either console are either shooters or car games...that is not a good thing for the industry
The Wii however has a broad spectrum. That does not mean its failing, it means they're actually utilising the industry, trying for equal distribution of game genres
Hardcore gamers nowadays are just "OH MY GOD SHOOT SHOOT SHOOT DRIVE DRIVE DRIVE", thats not hardcore, its just pathetic.
You cannot say its slipping. Nintendo has tried something new and succeeded, they're using old IPs, bringing new ones in, its just the third parties doing lackluster efforts. Nintendo makes good games...its not their fault that others arent
For the record before I get labelled as a fanboy I have all 3 so hah