Wiring together quantum computers and making them more secure.
Charlotte Hu writes in Popular Science:
The intention behind building such a network is to enable researchers to experiment with new types of quantum communications, security protocols, and algorithms with the goal of advancing towards a preliminary quantum internet (which could very well look like an early version of the classical internet). Currently, Toshiba is using it to test their distributed quantum encryption keys in a setting that experiences factors like noise, weather, and temperature fluctuations in order to understand how robust this method is, and what potential issues may come up.
At some point, this network will be open to researchers and organizations. It will be interesting to see what innovations they will come up with.