You are, of course, correct, but if you think about, this has become a distinction without a difference. All the relevant apps are on all the platforms, all the Apple TV+ shows work on the Apple TV App, any platform, and they all now support AirPlay.
Actually, in my household (3 AppleTVs), we use them daily but just about never use the mainstream streamer apps. I would definitely suggest that NO "all" of the relevant apps are NOT on all platforms... unless "all" is measured as mostly the mainstream streamers. Again, here at my home, the most used by far is Channels & Computers (app), neither of which are in the mix for most (maybe all) smart TVs.
Hmm, the Channels App. seems to be redundant to a streaming service that supplies DVR functionality (is that all of them at this point?) + Plex, which runs on everything for serving personal media. I use DirecTV streaming, which has unlimited DVR and runs on just about any device or TV, and it doesn't consume my Mac storage.
Channels readily tunes over-the-air channels via antenna (which gets all of the major networks in HD and many good sub channels like
MEtv,
Catchy,
AntennaTV, etc), cable,
PlutoTV,
SamsungTV,
Distro TV, etc... almost all of which is free (except the cable, though that delivers all live sports via a cable card setup that costs relatively little). No monthly "rent" at all except a relatively cheap cable cost, probably less than you are paying for DirectTV. Net is about the classic "500 channels" thing for very little cost.
The
DVR runs on NAS (Synology in my case), which means I have however much storage I want, with no time limits before stored media might be purged by the gatekeepers (because I'm my own gatekeeper) and- should I stop paying for cable- I lose nothing stored on it. Basically it's "whole home DVR" with all I've chosen to record stored on storage within my own control. Should I lose broadband completely, I still have both all DVR'd stuff and over the air live TV.
And I can
access it when away from home too, basically from my own "cloud" storage in that NAS on all iDevices or Mac. No cloud "forever rent"... it is MY OWN "cloud." No for-profit middlemen between me and the media.
Nutshell: With Channels, it's basically super deluxe cable box (minus the box rental) with all cable channels important to me, all the locals, and the vast number of free channels via Pluto, Samsung, Distro and more... for no subscription rents (except for cable).
Can you tell us more about the Computers app? I am actually interested in finding a reason to go back to Apple TV, but at this point it feels like a dumb move for me specificaly.
Computers app is a modernized version of the original AppleTV UI... before Apple decided to evolve it into the AppleTV app, trying to sell & rent media & subscriptions. It has no such ads... no such pushes for rentals or purchases or subscriptions. It is the one-stop app to serve up all of
my own media, ripped from discs, all home movies, the Photos & albums, favorite Podcasts, music library & playlists, ripped TV shows, etc. streaming via "
home sharing" functionality from hardware also completely within my control.
It's pretty similar to Plex except it also works with any Apple DRM and is an Apple-ized version of a Plex-like UI. Most people think they should use the Apple TV app for such content but this serves up everything from local storage sans the relentless pushes to buy/rent/subscribe. As such, we barely touch the AppleTV app at all.
I value the entire cost of AppleTV (and then some) in either of these apps
alone, even if AppleTV could run no other apps... though it does have
thousands of other apps that are available, also unlike smart TV app pools which tend to be only a relatively small group of choices (a few dozen? maybe 100 or so MAX?), mostly dominated by the major streamers.
I hope this is helpful.