After months of speculation, Apple finally announced its long-awaited wearable -- Apple Watch. What now? Well, if history has anything to teach us, it should do pretty well. The iPod, iPhone and iPad have all been success stories. What's more, all of them took an existing product category, and gave it a good shake up. Despite this, there are still some who doubt the public's appetite for a smartwatch. Is Apple Watch the shot in the arm that wearables need? Or is it that rarest of things: a "me too" Apple device?