I think it could serve as inspiration. If someone's on a quick deadline, they can have this thing spit out music which they can arrange. From my understanding, it happens pretty much instantly once you tell it what to do. I can't see myself using it much, but it could serve well for people writing for libraries or trailers.Given the amount of editing required, does it actually speed time to finished piece? Is it relieving composers/orchestrators of drudge work? From the video, I don't see that it does. I mean, it's a fascinating technology to be sure, and it may or may not get better in ways that matter.
The better analogy might be to composing/arranging with a phrase library. The algorithm spits out a set of precomposed bits—a kind of highly personalized phrase library—that you can arrange/incorporate as you will within the limitations of the licensing.