“This year, the spending on the Internet of Things (IoT) is poised to hit $800 billion worldwide, a 16.7 percent increase over 2016, predicts technology research firm IDC. In 2021, that figure will nearly reach $1.4 trillion.”

http://mobile.datamation.com/mobile-wireless/iot-spending-to-approach-1.4-trillion-in-2021.html?google_editors_picks=true