I don't know if the author has noticed but everything is down in Japan. Its not just Wii and DS.
He is basically right though, hardware sales are not what they used to be for Wii or DS. But in console sales they are still a damn sight better than the competition, where as in Handheld sales the DS basically approaching saturation (quickly), although the PSP has certainly gained some momentum itself:
Consoles
In short, I don't see anything to suggest this is a Nintendo thing and instead is probably just a Japan thing.








