I'm sure that if you're a director like Denmark's Anders Morgenthaler (Princess) you must get asked all the time why you chose to do a particular project in one format or the other instead of the opposite.  And so here Morgenthaler demonstrates what would happen if he shot a key scene from his upcoming kids' film The Apple And The Worm in live action as opposed to in animation.

You'd never get away with this in advertising for a Hollywood picture.  Nope.