As usual the devil is in the detail, and I want to know how much data can be transferred how far at what speed.

However, this invention purportedly transmits data by harvesting energy, and doesn’t need a battery or external power source. For the IoT this is massive.

The researchers believe that tiny passive Wi-Fi devices could be extremely cheap to make, perhaps less than a dollar. In tomorrow’s smart home, security cameras, temperature sensors, and smoke alarms should never need to have their batteries changed.
https://www.technologyreview.com/s/600773/10-breakthrough-technologies-2016-power-from-the-air