Worldwide cumulative wearable device shipments will reach 750 million units during the period from 2013 to 2020, according to a recent report from Boulder, CO-based Tractica, a market research and consulting firm that focuses on human interaction with technology. In 2020, shipments are expected to total 187 million units, amounting to $37.5 billion. North America represents the largest global market and will account for about $20 billion in sales in 2020, followed by Europe and Asia, which will each account for $7 billion to $8 billion. Latin America, the Middle East and Africa are predicted to contribute a combined $1 ... Log in to view full article.