Silicon Valley’s Fashion Week isn’t your typical gaga-for-Gucci spectacle. Instead of haute couture, futuristic LEDs light up the venue. Prêt-à-porter designerwear yields to 3-D-printed armor; drones, not razor-thin models with sky-high hair, zip down the runway. Here, the latest style-setting gadget isn’t some hyperarticulated bot or another impossibly tiny iPhone — it’s a “photobomber” hoodie […]