All Xbox One games can be livestreamed through Twitch, Microsoft's Marc Whitten announced during the company's E3 2013 press briefing.
Microsoft demoed the built-in feature with Rare's new Killer Instinct game being livestreamed via Twitch. According to Whitten, Xbox Live users on Xbox One will be able to "participate and impact the game" through Twitch.
Twitch said in a press release that the feature will be exclusive to Xbox Live Gold subscribers. Users will be able to upload gameplay directly to Twitch, broadcast their own games and watch other streams. Kinect will allow users to provide voice-over commentary, too.
Sony announced during the PlayStation 4 reveal that the console features Ustream integration, but the company has yet to announce Twitch streaming.