[didntknowyou]

curious, so if you build a "wall" of these, it would use up the wiress energy in the air so will absorb the excess waves around you?

[orbital-decay]

Of course. Ambient radiation is a viable power source for distributed sensor networks and similar low-power stuff.

https://en.wikipedia.org/wiki/Energy_harvesting

[cluckindan]

An array of these would also allow you to better discover individual sources in a room with lots of devices.

[thenthenthen]

Depends if you are standing infront or behind the wall ;)