Amazon is in the works of coming out with their own hi-resolution music streaming service sooner than you think.
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If Amazon can secure the licensing deal soon, this new service may be available by late 2019. The expected cost of the service is rumored to be $15 per month.
This new service puts Amazon in direct competition with streaming services like Tidal and Deezer. Tidal and Deezer offer high fidelity music streaming, but at $20 per month. Amazon has shown they are willing to lose money for an extended period of time of a product or service just to put other companies out of business.
Spotify Teardown: Inside the Black Box of Streaming Music (The MIT Press)