What should (but will never) happen, is an agreed upon streaming API that arbitrary clients can connect to. Pay for a subscription and you can use (Amazon, iTun

What should (but will never) happen, is an agreed upon streaming API that arbitrary clients can connect to. Pay for a subscription and you can use (Amazon, iTunes, Spotify) from a single application. The only trick will be the application will no doubt need to placate rights holders that no saving of streaming-only content is going on, which will mean some kind of DRM.