VoCo + Music Notation = Singing?

Just saw the video demo of VoCo and was amazed!  My first thought was "Will they make it sing?"  Could you add the ability to input music notation so VoCo can make the voices sing?  Speaking as someone who has worked with many musicians  who can't sing, this would be a big deal for those who would like to play with the lyrics like they do with the instrumentals. 

Also, it would be a lot of fun!  Winston Churchill singing "Elenor Rigby," the cast of Futurama performing "Marriage of Figaro," the characters from the Goon Show singing a melody of popular songs, the possibilities are endless.