The only reason Kinect has been so successfull is the same reason Obama is president:
O.P.R.A.H
Without her Mrs.Clinton would've been president (I know jack about US politics but read this in TIME), and Kinect would have been a mediocre. success.
Oprah speaks and Americans follow.
Just to safeguard me from being banned again I'll put a ':P' here to be safe:
:P