Xbox has released a video with Larry Hryb and Richard Irving a thorough look at Game Hubs on the New Xbox One Experience. Each Xbox One game has it’s own Game Hub with basic information about the game, Activity Feed, Achievements, Friends who play the game and Captures.
In a Game Hub you have the ability to follow a game which will allow you to view any updates from the developer in your Activity Feed. Under Achievements you can compare Achievements with friends, see time played, leader boards and other game specific stats. Captures allow you to view most popular screenshots or clips and view your own for the game.