motion-capture ideas

I was reading an article about "motion-capture" in regards to the newest Planet of the Apes movie, and as a throw-away comment, they mentioned that an actor could play "any creature, any race, and either sex".

That got me thinking, what would happen if an actor played a female role via motion capture?

It sure sounds like the sort of thing our writers here could have some fun with, so lets make it a challenge - can you make a story where a guy plays a girl using this tech?

I'll be interested to see if anybody tries this challenge ...