Spotify HiFi

I'm most curious at to what platforms and what the requirements need to be met from those platforms to accommodate Spotify HIFI,  will those platforms be proprietary, what it will actually offer, where it will be available, when it will be available, what the costs will be, how user friendly it will be, and how bug free and reliable it will be? Until we know all that, it's still mostly vaporware. These things seem to be announced prematurely in order to build anticipation, followed by many delays, and glitches. Wake me up when there is something more concrete to consider.