To be clear... does this mean that I won't be able to stream media from my PC/NAS to my TV any more? I mean... that's a pretty basic function of any streaming software, so hopefully I'm misunderstanding this?

In any case, I've mostly moved over to Jellyfin now that there is a decent app for it available on my Amazon Fire Stick. Have to say, Jellyfin may have been clunky in the past, but now it's a real alternative to Plex.