If the general public weren't satisfied with the Wii, we'd expect to see a low software to hardware ratio and for sales drop off sharply after a year or so. However, Wii sales were at their strongest a couple of years into its lifecycle, and 9.07 retail games per console is not too far behind other contemporary systems (PS3 and X360 were 11.43 and 11.76 respectively, but had longer lifespans). Plus, there were plenty of casual-oriented games that sold well AFTER that two year window (Wii Sports Resort,Wii Fit Plus, Wii Party, and the Just Dance series).
Compare this to the Kinect. That peripheral also had a strong opening in 2010, and 10 million in about 4 months, making it one of the fastest selling pieces of gaming hardware ever at the time. Likewise, launch games like Kinect Adventures and Dance Central sold great.. However, sales of the Kinect and Kinect games seem to have mostly died down by late 2012.







