Interoperability between IoT systems is critical, enabling 40% of potential value on average. While the hype around IoT has been great, the research finds the potential economic impact may be even greater at $3.9-$11.1 trillion annually by 2025 across various settings from human health to factories to cities. However, capturing this full value will require addressing issues such as interoperability and making better use of the vast amounts of data generated.