Let's be clear, this is a tech demo, the application is not going to be prompting infinite streams of low quality music. The application of this stuff is to enable creative tools (got a beat and some vocals, give me a bassline and backing chorus), real time computer jam partners, to provide "good enough" music for indie games/movies.

These models are still in their early phases - If AI was combustion engines, we wouldn't even be to railroads yet. Despite that, they're still fun to play with and useful when used correctly.