The ability to shut down an enemy's computer systems remotely is an awesome power, and will only become more impactful as we rely more and more on computer systems in our everyday lives.
Forget space: the internet is the next frontier. A group of enemy soldiers shutting down a hospital would be met with outrage and military backlash. A group of hackers shutting down fifty hospitals is met with jokes about outdated operating systems and derision towards IT directors.
At what point do we stop treating these like annoyances of a strange new world and start treating them like what they are: targeted, military-grade attacks. The whole world can see how woefully unprepared the West is for attacks of this nature and the attackers are only going to grow more bold.
The more intertwined tech is with the military, the more powerful the cyber-warfare paradigm becomes.