All of this will be a vast improvement over the current system. Right now, people connect to computer networks through copper telephone lines, which are slow and limited in the amount of information they can handle. Also, as anyone who has tried to connect to a computer network through telephone lines knows, they are prone to busy signals and sudden disconnects. A single fiber can carry something like 100 times the data as a copper telephone line. The reason for that is the mechanism is not electricity, but light.
Light is tremendously faster.
It's like the difference between a dirt path and an eight-lane freeway. Besides making people's lives more convenient, fiber optics will also enhance mission readiness.