How Long Do We Have to Wait for the Internet of Things 4.0? by @fmarotob via @Datafloq

IoT 1.0 and IoT 2.0 provide the foundational layer, IoT 3.0 is the bridge from things to humans and IoT 4.0 will be the social IoT.

This is great for many reasons - it helps understand what each of these are actually are but it also gives you an insight into their development and where it is going to be going in the future.