Please see this link for Broadband over Power Lines -- http://www.state.nj.us/rpa/BPLwhitepaper.pdf
This is a White Paper I wrote for NJ State. It also shows countries where Broadband over power lines is in place and the corresponding success rates.
The idea is to offer greater options to the users. Currently, where I live, I have only one option - Comcast Cable. It has virtual monopoly. I do not have Verizon in our area and Embarq's abilities are at best limited. Power lines are in every home. Every electric outlet would becomc smart and could deliver broadband.