Apple Launching Lossless Music Subscription Service?

Issue is not Roon, it is Apple, Amazon, Spotify, etc. They don't have an open API that allows Roon to work.  Spotify has Spotify connect, Amazon has selectively worked with a few large partners, no idea about Apple.

Amazon licensed it to Paradigm or whatever they are calling themselves these days (NAD, Paradigm, Bluesound, etc.)   Otherwise you need to hang a DAC off a laptop/PC.