This will almost certainly be based somewhat on PAN and PDSL, a technology that has been getting promised will do great things for years...
I remember back in the day when a company called summit like Scottsh Hydro Electric or similar started trialling internet services in i think cambletown in Scotland, something like 2Mbps for £15 a month back in ~2002, which was both cheap and extremely fast for the era.
I think they may have trialled it in England somewhere down south under another electric company (maybe Southern Electric), but as far as I know these trial's were never extended to further area's, because the technolog was simply too unreliable for consumers to accept.
In fact I do recall that it was actually Norweb who ran the very first trial's of this type of technology back in the earlyish 90's, for data and communication purposes. Im not sure to what extent their technology was working or quite exactly what service it offered/was hoping to provide, but I believe they were touting internet and possibly voice services, with a slim chance of television. Obviously the technology was in its infancy and digital television itself was only just being developed, so the idea of television running over electric lines was a bit far fetched for the time.
There are many countries in the poorer regions of Asia who recieve telephone lines and internet services via technologies based upon PDSL, and they seem to work well for these regions, but they are usually remote parts of the world, where they are poverty stricken, so it tells you the quality they would expect anyway.
It may work, but personally I can't see it would be the most stable of services, which is why companies that have trielled commercial services using home power lines have failed, and sales of PAN kits have been extremely crap, to the extent I have never come across anyone who uses it.
Good idea in principle, but it will never catch on imho.