Let the hive mind of Engadget get that for you.
"What is the best wireless surround sound speaker solution? I have a home theater where running wires is just not feasible. I have my own speakers, so I don't want a system that has speakers with integrated wireless. I've done a far amount of research and have only come across a few companies that even offer a reasonable solution: KEF, Kenwood and Rocketfish. Is there anything else out there? What do you recommend? Thank you!"
Ben, "Lucky for the Cable Co's they have used coax for their networks which is inherently better than the non-twisted pair the telcos have been using for years."
This illustrates how you report on what you do not know. Every physical telephone line in America is UTP, or Unshielded Twisted Pair. Coax is a single, shielded conductor.
Now, you could have known this had you spent the 30-seconds it takes to rip open a telephone line next to your desk, kitchen counter, etc., etc., etc.
Also, you might try to expand on your research before you report blindly. ADSL2+ is only one of several xDSL technologies one or more of the American telephone companies are considering. You mention nothing of VDSL or VDSL2, which presents even more bandwidth.
And had you spent a day or two on a website like DSL Reports maybe you could learn a thing or two about the xDSL technology being deployed these days, which so happend to bring the DSLAM (DSL multiplexer) a lot closer to the customer's neighborhoods and it connects them to a telephone companies core network using Gigabit Ethernet over fiber optic cable.
And you even prove the inability to even bgin debating the platforms of deployment by not even mentioning what the real potential limitations are and how they relate to HD in the first place. Do you even know?