"Most" of the content will be available in HD and free to Xbox Live Gold subscribers. While watching a game, viewers will be able to side with a team and see the split amongst the greater Xbox Live community.
During viewing, a ticker with scores is available from ESPN.com along with access to highlights from other sports and games.
All of this is controllable using a controller or using Kinect for motion or voice commands. Voice commands can be used to initiate view-controlled instant replays.