This kind of thing is immersive and valuable. I always try to have a soundtrack mix playing at the cons I demo Artemis at. We did it at Arisia and many people commented positively.
I know of one regular group who brags about their DJ buddy; all he does is spin a soundtrack, and it adds to the game.
Eventually I'd love to find some musicians to make an original, official soundtrack for Artemis that I could sell on the website and at conventions.
Creator of Artemis