Big things are happening with the new Apple TV. Not only have numerous readers received their now shipping notifications, alluding to a Friday arrival, Apple has also made several significant necessary infrastructure changes for tomorrow's big launch.
First and foremost, the App Store is now live for the Apple TV. Twitter is flowing with screenshots and images of the new Apple TV App Store. Although its discovery elements are still questionable, Apple is probably still in the midst of rolling out the categories section and top charts section. Remember, the actual launch isn't until tomorrow, so anything can change between now and then.
Secondly, Apple has released the final build of its tvOS software that powers the new Apple TV. In fact, you can download tvOS 9.0 right now.