Apple released the second betas of iOS 10.2 and tvOS 10.1 on Monday and in them, it included its new TV app. The company introduced the new app at its 'hello again' Mac event last month, saying they believe it's going to "completely change how you watch TV."
TV is essentially a television guide that helps you find and discover available content. So after using Single Sign-On to login with your cable credentials, the app will populate with movies, TV shows and live events, with a focus on stuff you might be interested in.