>>321720071
what made DDR, OSU! and Beatsaber successful is the fact they allow the "easy" creation of "stepcharts". This allows games like DDR, Beatsaber etc to get around licensing. 
For an actual dancing game to be super successful, you would need to come up with a way for the game to record you doing a new dance and implement that into the game for people to copy (as well well as a way to show what moves are coming up in the future)