Incidentally there are videos of Thom Browne's catwalk shows online and they are interesting events. His site has a show on it here but doesn't seem to be working particularly well. There are some images and a brief review of the S/S 09 catwalk show here and here. I think that it's important to regard this kind of work through the lens of decades of haute couture and catwalk theatre. The line between clothing and costume is always up for discussion and is hardly a new subject, just look at the work of Poiret.