I think Google Cloud Printing is an excellent example of IoT Connected solutions. The solution contains physical devices (printers) that are connected to the internet. The sensors within these printers can communicate when ink is low or paper is required. They can print from multiple sources and the cloud-based portion of the solution needs to be smart enough to manage queues that could become optimized, prioritizing print jobs based upon the source of the device or an attribute of the document being printed.