Absolutely not. Not unless you consider all game systems a fad. Its sales peaked in year 4 and year 5 had sales similar to year 2 and 3. It was a very typical console life. I would call a fad something that is big for 1 Christmas and dies afterward. Wii did not do that at all.
I wouldn't consider motion controls a fad either, as the Gamepad uses upgraded versions of it and Wii Remotes are still used, PS4 devoted a significant portion of the reveal to Move and its DS4 has motion sensing, and Kinect played a major late-life role for XBox360 and will likely be a major interface for Nextbox.
The only Wii-related thing I might call a fad is the Wii-series. Since many game series bridge generations, it should be reasonable to expect that a Wii game would have life in the following generation. Games like Guitar Hero have died off, so I call them fads. The test will be be Wii Fit U, Wii Party U and so on. I'm a bit skeptical on Wii Fit U and the others, but we haven't had the test yet to determine if they still have draw. We'll know soon enough.










