Apple will introduce new versions of iOS and OS X at its annual developer's conference.
Apple Releases tvOS 9.0.1 Update for Apple TV
The new 9.0.1 update can be downloaded over-the-air through the Settings app on the Apple TV by going to System --> Software Update.
Apple has not provided release notes for the tvOS 9.0.1 update, so the exact details on what's new are not yet known. Any discoveries we make will be added to this post.
tvOS 9.0.1 comes as Apple is testing the first major update to the operating system, tvOS 9.1. Apple has thus far seeded one beta of tvOS 9.1 to developers, with release notes for that beta pointing towards improvements to networking and scrolling. tvOS 9.1 also appears to include support for Siri search for Apple Music.