Twitch announced for the playstation 3 and 4

Twitch announced today that the streaming service will definitely be coming to Sony's PlayStation 4 console this fall.

After linking their consoles to Twitch, players will simply need to press the Share button on the PS4 controller to upload gameplay. If players prefer to spectate instead of uploading their own footage, an app will be available on the console for that as well.
Twitch confirmed at E3 that Xbox One will utilize its streaming service as well, meaning both upcoming consoles will be equipped with streaming options.