fad
–noun
a temporary fashion, notion, manner of conduct, etc., esp. one followed enthusiastically by a group.
a fashion that is taken up with great enthusiasm for a brief period of time; a craze.
a temporary fashion; a craze, interest or activity that (some) people follow enthusiastically, but lasts for a short period of time
It's not temporary nor is it followed enthusiastically by a group any more than any other console.
It's not a FAD, sorry but you're just stirring the pot with this thread, and I haven't read all of the posts, nor do I need to make the point I want to make.
It's simple, the Wii isn't a fad, and saying so is making negative comments about the Wii, don't try and justify it any other way.