Apple released a minor update to the new Apple TV yesterday, which bumps up the version number to 9.1.1. The update primarily focuses on minor bug fixes and performance improvements, except for one major addition, assuming you are really into podcasts.
Apple's Podcasts app is now finally baked into the OS, which means you can watch or listen to all the podcasts that you have subscribed in iTunes or on the iOS Podcasts app on your television. The app was previously part of tvOS beta but now available in the latest stable release.
The next major update slated for Apple TV is tvOS 9.2, which will bring more features, such as Bluetooth keyboard support and app folders.