Apple TV has a most helpful new feature - now you can press a button to make Siri hear your voice.
This works for all kinds of things including inputting in any kind of search bar - you can use your voice just as you would a keyboard. And you can also use the new dictation feature to input passwords, which could be a godsend. It may not be the most secure way to access secure content but it's a lot less fiddly than previously having to input long strings on the tiny included remote control.
These features are part of the beta 3 version of tvOS 9.2 - so while it's not available to all it certainly will be soon. It works by simple holding down the Siri button on the remote and talking, and you'll get an indicator on screen to let you know its working. MacRumours has a few more new features in this update.