Much of the discussion of the real-time web has focused on content generated by humans, such as tweets. But the bigger growth over the next decade is likely to come from m2m interactions. One big source of data will be smart meters. For instance, the UK government recently unveiled a plan to equip every home with a smart meter by 2020. The real-time electricity usage data from these meters can be used for better management of consumption by individuals, companies and utilities. In addition to...