Hi Jonathan,
Nice post! I'd like to point your attention to the IEEE 802.11ah amendment which operates in the unlicensed 900 MHz band for longer range sensor networks. This will provide much greater coverage than existing 2.4 GHz and 5 GHz Wi-Fi, and will be able to penetrate RF obstacles much easier. It will be lower throughput than existing Wi-Fi, but its intended use-case only demands low throughput anyways. The adoption of .11ah in the 900 MHz band will be a big piece of the infrastructure puzzle to enable M2M technologies and the IoE.

Cheers,
Andrew von Nagy
@revolutionwifi