8. One or more computer-readable non-transitory storage media in one or more computing systems, the media embodying logic that is operable when executed to: access a social graph of a social-networking system, the social graph comprising: user nodes that are each associated with a respective user of the social-networking system; concept nodes that each correspond to a respective device; and a plurality of ownership edges connecting the user nodes and the concept nodes, each particular ownership edge indicating that a particular user corresponding to a particular user node owns a particular device corresponding to a particular concept node; determine from the social graph a device of a user of the social-networking system; determine, from the social graph, media content that a friend or a connection of the user in the social graph is currently viewing; and provide the media content that the friend or the connection of the user is currently viewing for display on the device of the user.
8. One or more computer-readable non-transitory storage media in one or more computing systems, the media embodying logic that is operable when executed to: access a social graph of a social-networking system, the social graph comprising: user nodes that are each associated with a respective user of the social-networking system; concept nodes that each correspond to a respective device; and a plurality of ownership edges connecting the user nodes and the concept nodes, each particular ownership edge indicating that a particular user corresponding to a particular user node owns a particular device corresponding to a particular concept node; determine from the social graph a device of a user of the social-networking system; determine, from the social graph, media content that a friend or a connection of the user in the social graph is currently viewing; and provide the media content that the friend or the connection of the user is currently viewing for display on the device of the user. 9. The media of claim 8 , wherein providing media content for display to the device of the user comprises streaming media to the device of the user from a device of another user of the social-networking system.