Fashion, function or just a fad? Wearable technology is getting huge amounts of attention from companies of every size and stripe. Consumers are slapping on fitness bands, experimenting with smart watches and trying on jewelry that syncs with their smart phones. Christina Mercando, CEO and co-founder of Ringly, which fits in the fashion/jewelry segment of wearables, joins a16z’s Chris Dixon in a discussion about this emerging technology segment. What is working today, and where things are headed in wearables.