Power-line communication to household!
Why stop there? Why not get rid of all the expensive extra wires and use radio. But of course a lot of TV connections were (and are) still radio except of course cable TV. But if you got rid of the cable and went back to radio you would lose something right?

Yes, you would lose the ability to receive a multitude of TV channels and the reason is because the airwaves are cluttered with other stations competing and this creates a problem in bandwidth - you just cannot get all the different signals thru for all the customers so cable-tv was born.

It's the same with PowerLineComms - there actually is quite limited bandwidth and not enough room (currently) to get anything like the number of stations into the home (compared to cable-tv).