Sony released a new trailer today that shows off the upcoming Share Play functionality coming to the PlayStation 4. This will effectively let you hand over a virtual controller to your friends to let them play your games, or join you in a "local" multiplayer games, for up to an hour at a time.
Share Play will be included as part of the big PS4 system update slated for October 28.
Share Play will be included as part of the big PS4 system update slated for October 28.