a) animations will look more like someone flying/hovering and
B) NPC's will be able to use the spell when they need to as well.
I think this could create some very fun battles if they do the physics and AI right.
Imagine hurling fireballs each other in the air and the flaming corpse of the defeated falling 50 feet into a lake, followed by the satisfying "hiss" of fire being extinguished in the water and a splash that takes into account the the height that this person fell from.
I dont think its gonna happen, but a man can dream can't he?