  This article summarises the current status of classical communication
networks and identifies some critical open research challenges that can only be
solved by leveraging quantum technologies. By now, the main goal of quantum
communication networks has been security. However, quantum networks can do more
than just exchange secure keys or serve the needs of quantum computers. In
fact, the scientific community is still investigating on the possible use
cases/benefits that quantum communication networks can bring. Thus, this
article aims at pointing out and clearly describing how quantum communication
networks can enhance in-network distributed computing and reduce the overall
end-to-end latency, beyond the intrinsic limits of classical technologies.
Furthermore, we also explain how entanglement can reduce the communication
complexity (overhead) that future classical virtualised networks will
experience.
