video;
It's got a handful of uses. Training for the Defense Force and potential game modes, but it's got some sweet tech that allows replication of memory-- so for instance, you could upload your favorite park, your house or home city and revisit it. Even with someone from the dome who hasn't been there before to see it first hand.
And then there's also the use of the machine to safely bypass certain restrictions in the dome, like the sex ban. [Which people are either for or surprised by, but she shrugs.]