A Google search for JRiver Roku lead me to this thread as I am about to cut the cord, so yeah, a JRiver client app that loads onto Roku, Fire Stick and/or Smart TVs would be awesome.
Jeff
Edit: I left this post and kept searching and found that Roku supports limited audio formats that wouldn’t work with my ripped blu-rays. Apparently, a more powerful processor-based piece of hardware is needed.