I don't think they'll ever do a runway again because most of the dresses they make now, save for the drapey goddess stuff, don't move nicely. A lot of what they do is either incredibly bulky, incredibly stiff, or both. It kind of works on a red carpet because an actress isn't really walking, just slowly shuffling a few feet at a time, but put any of their origami folded/tulle smothered/hobbled mermaid dresses on a runway on a model that has to move at a certain pace and they'd surely lose a bit of their luster.