Here in Denmark where I live
the power companies (those who provide the electricity) have a plan to offer broadband with much higher download speed than normal. We're talking 10-30 - to maybe 100 MB download speed.
There are, in fact, some places where you already can get this.
However, I doubt if the power companies have been succesfull at this point?
I think that providing high power downloads via the electric cables is the way to go. Then broadban connections will be as availabe and normal as electricity is today - at least in some places of the world.
Oh, and I forgot to add that my broadband is cable of sorts, don't have a download cap and that(normally) game downloads etc. happens with a speed between 10-30 MB/minute (or sec?)