Majority of Music is now done by Streaming
The likes of Spotify, Pandora, Tidal, Apple Music, Deezer, and other music streaming companies are supplying us with the majority of our music now.
Vinyl also continues to grow, and its about to surpass CD sales; while vinyl is growing, CD's continue to decline. The CD has a very low cost to produce, so it will stick around for awhile and you can still find new cars with CD players - but that will soon change.
Some of the music streaming services are working on higher resolution formats, and that will become a big growth area later once it gets more traction. Wikipedia has a good article on high resolution audio.
There is a movement called the MLC, which stands for Mechanical Licensing Collective, and is part of a new law called the "Music Licensing Modernization Act". Its goal is to improve how music licensing is done, to make it fairer and help artists earn; but it is early days for the MLC. You can read more here.
Spotify continues to be the best music streaming service, no question. Many people kind of gave up on Google, which at times has offered a rather confusing mish-mash of services. Amazon is starting to raise its quality level, even talking about higher definition music, so lets keep an eye on Amazon Music, too.
You can also read more about our invention, called the Master API, at our music blog site: MusicStreaming.com