How to control light with water

As someone else commented - Even more interesting than sending light down the fiber, we send MULTIPLE "colors" or wavelengths of light down fiber: Multimode.  With the use of a fiber optic multiplexer, we can do what's called Wavelength-division multiplexing.  Similar to how phone lines can send different frequencies down the same cable to carry your voice and data transmissions, multiplexing allows significantly more throughput (bandwidth) to go down the same strand of fiber. 

You mentioned that we will never be fully wireless, but I'd like to augment that statement.  End users can and will have the ability to be fully wireless in the near future, but it will be because of the accelerated growth of fiber optic networks that will allow this to become a reality.