The Internet of Things (IoT), which consists of billions of objects linked to each other and the cloud, is widely considered the hot growth market for tech companies. Cisco (NASDAQ: CSCO) estimates that the number of connected devices worldwide will double from 25 billion in 2015 to 50 billion in 2020. Bain Capital believes that annual revenues from IoT hardware, software, and solutions could hit $470 billion that year.