What it is: Apple TV can now show you video camera feeds when someone is at the door, linking up with products already using Apple's HomeKit platform.
Why it's cool: This feature turns Apple's big-screen experience into personal surveillance TV — which should help users became way less paranoid... or more.
What it is: The Apple TV can now play YouTube videos back in 4K. This is because the system now supports the VP9 codec that YouTube uses to deliver these high-resolution videos.
Why it's cool: This was a glaring omission from earlier versions of the Apple TV, forcing avid YouTube fans to consider other products.
What it is: The Apple TV will now allow you to manage HomeKit-enabled smart devices from an overlay menu.
Why it's cool: Users will now be able to choose from a variety of scenes that bring a home's smart devices together. Time for a movie? Set a special movie scene to dim the lights.
What it is: The Apple TV now offers expanded multi-user support for players to pick up where they left off, switching users through an on-screen overlay, and support for the Xbox Elite 2 and Xbox Adaptive controllers.
Why it's cool: With Apple Arcade cementing itself as a key service on the system, users will be able to make the most of the service's wealth of games.
What it is: Yes, you're mesmerized by Apple's breathtaking screensavers — and now you'll have the option to choose which one you'll see.
Why it's cool: Have you ever seen one of the Apple TVs famous flyovers and wanted to back and see it again? Now you have some control over the experience.
What it is: Apple already offered PIP in its Apple TV app, but now it's bringing the feature to everywhere you watch video on the device.
Why it's cool: Want to browse apps but keep the game on? Want to check out the news while you're waiting for a press briefing to start? Do you have ADHD and just need more stimulation? PIP will solve all your woes.