USB only supports up to 3 meters of data transfer. To use the USB network to transfer data, which would be a reasonable extension if a home USB charging network is in place, the USB standard needs to be modified.
I've long wished for centralized backup power in the house for the ubiquitous small devices that run on low voltage with power adapters. Why not have USB charging outlets that reach back to a backup storage battery in the basement? Then clocks, modems, WiFi routers, and wireless phone base stations could all work when the power fails.