One goat-fur blood-pressure scalp cuff to go, please: Never mind your phone and its navigation apps: that’s so 2013. So are hairdressers, apparently - Wouldn’t you just love to wear a smart rug? Yes! Sony is working on a U.S. patent for its “SmartWig” hairpiece, Bloomberg reported late last week. And what will this clever cap do? Depending on the model of this...