Indubiatibilly. When it was huge my dad even wanted to buy it! Word of mouth about being able to control it with your body was monstrous! However, now that kinect has stolen the motion control market, nintendo will really struggle to ever sell anything near the Wii numbers again. They will need a new fad! Like mind control or something.
My prediction threads:
Wii U will sell under 40m units (made on 14th September 2012)
PS Vita will sell under 20m units (made on 30th September 2012)
Wii U will sell under 7m in 2013 - I was right