It would be great if Mezzmo ran on a NAS. Specifically, a NAS from QNAP or Synology. In particular QNAP has very good support for the Plex Media Server, virtualization, Kodi, Plex client. The TS-251+ is an inexpensive two bay system with HDMI out and functions both as a NAS and a media player/computer.

Also, are there plans for a tvOS ( Apple TV) client?

Thanks...