The killer feature in this update, to my mind, is "Wireless Audio Sync", which lets the Apple TV use your iPhone as a remote sensor, playing sounds through whatever speakers you may be using (be it TV, sound bar, or home theater), and listening with the phone (or iPad), to measure the audio delay with high precision. And it then arranges to delay future video or audio just the right amount (we're talking milliseconds) to make the sound match the screen. ("Wireless Audio Sync" is in Settings > Video and Audio, at the very bottom of the list - it hung on "Preparing" the first time I tried; after rebooting the Apple TV and my iPhone, it worked just as advertised.)
The changes to the top display aren't that big of a deal to me. The Netflix app is infuriating because it constantly plays stuff you don't want on the majority of the screen while you're trying to concentrate on / parse the little thumbnails, looking for the things you do want to see, trying to find that one that was here just yesterday. But with the top of the AppleTV screen, the control over what is shown in the top banner area goes to the currently selected app in the top row. Just move the "noisy" ones out of the top row. Netflix, WatchAid, and iTunes Movies are still giving me a static row of movie posters (more or less), which are actually helpful. The TV app and the Music app are putting up single images (or video, sometimes, in the case of the Music app)... it's not bothering me yet. The Music was kind of nice. And, again, I can swipe left or right in the top row of apps to a less exciting one. For me, the net effect is mostly that the previous thumbnails of things I'm watching, from WatchAid and Netflix and iTunes Movies, are a bit bigger. Not quite the apocalypse I was hearing predicted.
The TV app needs a big toggle switch at the top of the main screen, when you open it, for "show me things you think I might want to watch next" (like what it does now), or, switched the other way, "show me only things I own or that I've added to my queue on services I already subscribe to" (e.g. "zero advertising/upsell - I know what I wanna watch" mode). Until then, I'll mostly use WatchAid as a front-end instead.
I looked for the new screensavers, they're not there yet. I changed the download frequency from Weekly to Daily. We'll see tomorrow.
The Arcade app looks nice, and what I'm hearing elsewhere actually makes it sound pretty compelling - if you're looking for games to play (and if you're open-minded enough to actually try things and see if you enjoy them, rather than jumping straight to "this isn't a AAA FPS title on a PS4, so therefore I know it's crap"). I just don't have time right now to play (a little time still goes into Pokemon Go - we have a nice neighborhood group, it's kind of a social thing). I might get into Arcade at some point in the future when other things calm down (same reason I don't subscribe to, say, HBO - I'm persuaded their shows are awesome, but I don't have the dozens of extra hours to put into watching it).
I'm really hoping they come out with an AppleTV 5 at the next (October?) event. Make it a little bit more of everything ("faster / better / stronger"), and make the remote more ergonomic - the control layout is fine, but get away from the 1/8" thick slippery rounded rectangle! You let Jony convince you to make this one "elegant" instead of "ergonomic", but he's gone now. Make it so I love using the remote without putting a case on it, that's all I'm asking, Apple. A little more contoured and grippy. Is that too hard?
Under Accessibility/Motion the video previews can be turned off. The apps still rotate through still images, but that’s less annoying.
