In that document, Apple confirmed the long-rumored “hub” feature of Apple TV:
If you have an Apple TV (3rd generation or later) with software version 7.0 or later, you can control your HomeKit-enabled accessories when you’re away from home using your iOS device.
Sign in with the same Apple ID on your iOS device and Apple TV, and you’ll be able to use Siri commands to remotely control your accessories.
Earlier today, The New York Times reported that Apple won’t announce any new Apple TV hardware at its upcoming WWDC. Considering that HomeKit (which is rumored to get some stage time next week) can already work on the current-gen Apple TV, it’s no surprise Apple may prefer to sell the current model and wait to get the next generation just right. It’ll be interesting to see Apple’s plans for the Apple TV as a connected home hub unfold over the next few months.