Google Glasses, for all their hype, were a tech flop. But those failures have turned into inspiration for Dylan Rose, founder of Glimpse Wearables and the designer behind Kai — a device that turns normal glasses into smart glasses. "This product was designed with Google Glass’ failures kept heavily in mind," he said. Kai is a voice-activated smart assistant, in the form of a small, oval-shaped device that clips on the back of a pair of glasses, tucked behind the users' ear. Using voice activation,…