Can't see how's that gonna cut cost in half. Maybe wiring but the controller for all the lights will probably cost 10 times more than wiring.
Neat Idea ..
What makes his system unique is that the switches run without batteries, harvesting energy from ambient sources such as radio frequency signals. Instead, each floor would have one or two RF (radio frequency) power transmitters to power up all switches inside the house.
I like this line:
The “seamlessly automated” system
