CNET News: The consumer technology industry has spent the last 18 months hailing wearable devices as the next big thing. But who will want a smartwatch? And, more important, why do you need one? Apple set out to answer those questions with the unveiling of the Apple Watch, its entry into the burgeoning area of wearable technology. Though the watch made its debut in September 2014, customers had few details about the gadget until now. Apple calls it “the most advanced timepiece ever created.”