Google Glass was hideous and as this well written piece shows was built by techies to be used by the smooth. If Apple had designed them they would have worked.  Snapchat have not only designed something that looks genuinely ok to wear but also has the functionality people seek. They way they soft launched them made them a must have for an exclusive few. I liked the look of google Glass because you could use it as a recruiting app. For example recording interviews without losing eye contact. Can't really do that with Spectacles but then they were not designed for that use