Probably need to be more specific about 'skill as a dancer' too though - I think you're responding mainly about motor control (?) but try choregraphing a bunch of three year olds to actually perform that routine!
Evaluating robots on whether they do what they're told and whether their timing is good doesn't seem too useful. That's the easy part. Pretty much any robot is going to be more precise/predictable/consistent in their actions than any human, let along a three year-old.