Apple Seeds Sixth Beta of tvOS 18 to Developers

Do you think this option would work on TVs too?

Yes, it should work on anything that has a 21:9(ish) screen.

21:9 is just an aspect ratio, so it should work on any device capable of displaying it. The thing is, they've never said "what" they mean by 21:9. Content that is in 21:9 (2.40:1, 2:39:1, 2.35:1, aka 'Scope') is distributed in a 16:9 wrapper that has black bars on the top and bottom so that it will be displayed correctly on most TVs (The same way "letterboxed" movies were distributed in a 4:3 wrapper before widescreen TVs were prominent). There are almost no native 21:9 projectors. The way it works is you use an anamorphic lens that sits in front of the projection lens to squeeze the projected image into the scope format (21:9). Obviously using an anamorphic lens will distort a non-scope image, so most projectors have anamorphic modes that compensate for this.

My hope is that what Apple means by 21:9 is twofold: 1. That all menus will be able to be displayed, unstretched and undistorted in 21:9. 2. That their software, once told that you are using a 21:9 screen, will be able to move any subtitles on 21:9 content out of the bottom black bar and into the displayed area. Both of these should be really easy for Apple to implement. My media player from Zidoo, a very small manufacturer with far fewer resources, has both of these capabilities already.

Does it have Snoopy screen saver?

Yes, I have a projector with a scope screen. Having my ATV4K Gen3 display menus in 21:9 would be awesome.

Have they implemented the 21:9 support? I have gone through every beta they've released for TVOS 18 and have yet to see it (or I'm looking in the wrong place).

All sorted. It wasn't the update. I just had to off and on it all 🤣

The answer to literally all receiver problems 🥴 (with some added cable unplug/replugs)

So far the public beta seems pretty solid as far as Atmos/surround support. I wouldn't ever recommend folks getting the developer beta unless, well, they're a developer. 😛