[microcolonel]

I was wondering: Clearly not everything can have its own WiFi radio, it'd be expensive and pollute the spectrum.

Assuming we'll have rooms, buildings, and blocks absolutely packed with low-bandwidth radios like this; what radio standard is most promising at the moment?

I've seen some work out of Stanford (10.1109/VLSIC.2014.6858380) which looks interesting, but I'm not sure passive radios can harvest enough energy to do auth, which is a deal-breaker.

[valentinheun]

I think the new specifications for bluetooth with ip6 and Mesh networking are interesting. But the open hybrid platform builds up on the most common ground. If WiFi pollutes the spectrum, jet there are more and more SoC's with WiFi on board pushing in to the IoT marked, maybe the WiFi consortium will take care of the pollution with a LE standard update.