The best examples of Pinsound installations will have exemplary content to accompany it. IJ and DESW are prime examples. Tons of great sound available (in the form of stereo audio from multiple BluRay movies) to use in the orchestration.
This is why, (so far) we've not seen a super compelling WPC95 title. Of those 13 games, only 4 are licensed and only Congo has a movie that might have some available content.
When good content is available (and some kind soul takes the time to put it together), it is way-cool and totally elevates the experience.