^The shoes are totally appropriate, because this design concept is derived in part from shoewear, which by necessity has always been cage-like.
Body cages are a bridge between armor/self-protection and underwear/exhibitionism. This strange interplay is an important theme for our times, and was reflected previously by the ever-popular S&M trends of recent seasons (latex, tough shoes, body-con, corsets etc.) Now all those trends have started to seem tired, but the ideas behind them remain relevant. A newer, fresher spin is needed, and this is where cage-like garments come in.
Another element to this trend is that we're going to see a lot more architectural designs from high-fashion designers in the future. Designs that are based on intricate construction. The fashion industry cannot ride on things like It-bags, cult shoes, and $200 tshirts indefinitely, or at least, I hope it doesn't. It must find a way to make consumers excited about the design process again. And for all its elitism, body cages and architectural pieces are not easy for lower-end brands to create (including jewellery); so it's partly a business strategy.
Oh, and Alexander MacQueen sometimes touched on this theme in his work, but I'm terrible at remembering which shows. Help, anyone? He mostly exposed the structure of petticoats, it was really stunning.