The official Xbox One Twitch app got updated yesterday with support for Host mode and Recent Activity Hubs. Hosted channels will now appear in your followed directory just like they do on the web version. Now, when your favorite broadcaster hosts another channel, you can easily transition there with a simple button press. Also, the new Recent Activity Hub displays recently viewed channels and games, your followed channels and games, as well as recommended VODs based on what you’ve been watching.
Read more about it here.