Around the web this week in IoT news, Onion has made Microsoft’s Siri-rival Cortana interface with smart home hardware, and TUAW have a review of the Revolv home hub with Pocket Lint looking at the Fibaro hub. Elsewhere in the smart home, Emerson has released a battery controlled smart thermostat to undercut Nest on price. This should let customers install the device without having to fit new wiring, although the Sensi won’t win any awards for its looks. Another report puts the IoT market at $1,423.09 billion by 2020, while the Guardian has a good write-up of the findings of a Pew Research report that compiled IoT industry opinions (good and bad) for the future. There are black clouds on…