actually its nothing new at all, i have seen a project from 10 years ago for a model rocket that had a battery and accelerometer in a sealed unit that was charged with this prinicple
actually about that satalight module, there are some tricky things in there and the full implications havent yet been revealed or explored
personally i am waiting for the 1 shot ion cannon upgrade before i buy one oyf these things
yeah the zigabee is nice, but i am saying if you have bluetooth you may as well just connect to your house over bluetooth and or wifi and connect to the home controller then send commands (http, ssh, some hacked up shell script with nc)
just because not everything in you home will be zigabee connected so you might as well just make it a service on the network and use the home controller as a "protocal routor" at layer 7
just a side note, wireless usb does in no way provide power, it is a comm protocal only