Sanjay Manney of Echelon has written a good article on the differences between IoT and IIoT (Industrial Internet of Things) and the requirements of each.
IoT and IIoT or Industrial Internet are terms which seem to mean different things to different people. One of the important insights in Manney's article is that whereas IoT could start from a clean slate technologywise, IIoT is brimming with legacy systems and 20+-year-old machines which still need to be running. Thus the requirements for integration will be huge.
Security questions are also different. It is one thing to collect data from machines - another to use it for controlling them. The idea of driverless cars sounds wonderful - but after seeing a recent document about how a hacker hijacked a normal car remotely and pushed the brakes on in full speed begs the question: how easy a target will a driverless car be? What the document pointed out was: this is a problem to be solved, and it can be solved, but the maufacturers will have the responsibility to solve it.
What is exhilarating is that there will be vast opportunities to bring new and more efficient solutions to industries. And that, after all, is the only path to real sustainability.