Although the wearables market had its ups and downs in 2015, it experienced higher-than-expected growth, according to a recent report from Tractica. Fitness trackers and smartwatches were the main drivers of volume and growth, with unit sales for fitness trackers doubling since 2014, out-performing industry expectations. While the Apple Watch performed lower than expectations in unit sales, in terms of dollars it is the largest revenue generator in the wearables market with an estimated $5.5 billion in revenue, said ... Log in to view full article.