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!"
"Yes, you can transmit gigabit speeds over 2 miles with fiber, but the normal household doesn't need 2 miles worth of a run. So between that and the previously mentioned points, copper stills wins."
The bulk of the cost of using fiber optic cable in the ground is digging up the right of way and not the material costs. Even telco-grade optics is relative. And since this would be a consumer application the quality to achieve transport over 20-30 meters (instead of 2000 meters) should further the inexpensiveness.
Now add consumer bulk in manufacturing and the expected costs should fall sharply. BTW, I never meant to suggest using raw fiber optical cable for the DIY fabricator, and apparently this Honeywell product assumes the same dang thing since its using connectors and not punchdowns. :)