Imagine if you will IoT enabled devices interconnected and feeding data and resources to each other. Your smart phone can access your bank account and car so that when you stop for gas it is already paid. No need to swipe a card or look at a prce, it is just ready when you pull into the gas dealership.
Your bathroom scale can send your weight to your refrigerator and if it is outside a preset value the refrigerator could modify your shopping list at the supermarket so that the weekly delivery would not contain full fat cheese or ice cream.
Or the phn in your camera could take a picture of the couch and if there were signs of wear order you a new living room set. All without you having to waste your time shopping or balancing your bank account.
But it gets even better. Hand helds, laptops, etc. often sit idle for long periods. Excess machine cycles could be sold to hosting services much like excess cycles are used for SET or gene folding applications. Excess hard drive, CPU, or ram could be sold to an ISP. Apps could have ads could be targeted to you and your friends in your address book depending on your location. Health insurance companies could ensure you live a healthy life etc.
A wonderful world to live in! ;)