Ubisoft never said the market for this type of game was drying up on Wii - they said it was drying up on DS.
That said, the game is a dance simulator. If you like dancing, you are going to like the game. Don't like dancing, you won't. This is the type of game that should never score a 2.0 because if people are buying it is clearly fun in some way, and it isn't broken.
People are difficult to govern because they have too much knowledge.
When there are more laws, there are more criminals.
- Lao Tzu