Nintendo "deserves/earned" the top spot not for their innovation of the controller and what it can do. No, it is because of the new gamers crowd that they brought in.
Parents see the PS3/360/Wii on a shelf, and asks:
"Which one will my 2 daughters like?"
"Which one will stimulate their minds and keep them moving about?"
"Which one will the family as a whole like the best?"
After being told which one, imagine the parents' surprise when they are told it is not as expensive as the other ones as well.
Torturing the numbers. Hear them scream.