I am planning on getting an Apple TV, but it will be located with our other audiovisual equipment which is in a separate room of the house from the TV itself (we have a universal remote which controls the receiver, DVD player, etc.) I know the Remote app is available on the iPhone and it can control functions of the Apple TV. My question is - can that app be used to basically replace the Apple Remote? Or will I be missing some functionality by using the app instead of the regular remote?