I think smart enthusiasts and single board computers are going to clear the landscape of esoteric/boutique outfits.
The Pi5 should be interesting as it supports 4Kp60 and HDR. I would think overpriced HD Fury will be Zapitti as the low end gets indistinguishable.
Media players will always be around...each has their pluses and minuses. There is no "one and done" model yet.
The past Pi's ran Kodi fine...if you like Kodi. They are useless as streamers though...no license/certificates.
New Pi5 is more of the same, just a little more powerful.
You can make a real nice media player out of a Pi.
Dune and Zappati were/are the same hardware. Dunes media player is the best, developed over many years and uses a Linux kernel. And the Dolby Vision VS10 engine is sweet. (Its all I use, everything in DV)
Dune isn't for streaming either....Zidoo's are similar to Dune, with a little more emphasis on Android. (I stay the hell away from Android myself)
Zidoo have a better poster/movie wall and music player than Dune. Both are worthless for streaming.
Shield is more for streaming, and has no native video player...and it does Plex well for those that like Plex.
And it does Kodi well, Dune and Zidoo do not. No VS10 Engine on Shield either, and it's very heavy on the Android.
I've had many many media players...for my use case, I use a Dune.
I don't stream...all my media is on hard drives direct connected. Never needed Plex.
Don't like poster/movie walls...just give me file explorer.
The Dune running everything in Dolby vision is pretty stunning.