I would like to see a music streaming service with a vast music collection similar to Spotify and Rdio but instead of providing an app and charging users for subscription, this startup would simply provide an API that gives developers access to build apps with their music collection and charge developers for bandwidth and storage, similar to the way Amazon s3 charges for bandwidth and storage.
It would be like the early days of twitter when developers could plug in to twitter’s pipeline and build social apps, but the difference here is that is that this startup already has a business model. So no conflict of interest with third party developers.
With the creativity of developers I can only imagine the diversity of music apps we could see from this. Developers with special interest in certain music genres could create human curated music apps for the genre. There will be genre specific music discovery apps and music streaming apps that are tailored for specific situations.
I hope someone would build this service.