Researchers at Bell Labs have developed a "phase conjugation" approach to increasing the capacity of fiber cable, and were able to send a 400 Gigabit/second signal across 12,800 kilometers (7,680 miles) of fiber. This capacity and distance are significant because the length of the test cable is longer than the longest undersea fiber cable.
It also demonstrates what I have been saying for a long time: fiber future-proofs your community. A fiber construction project creates a new long term asset with a useful life well in excess of thirty years, unlike wireless, which is primarily electronic equipment with a life span of only 3-5 years.