Owners of the PlayStation 3 version of Final Fantasy 14: A Realm Reborn will be able to upgrade to the PlayStation 4 version free of charge, but they will lose access to the PS3 version by doing so.
Speaking with Famitsu (via Siliconera), the game's director and producer Naoki Yoshida explained that the upgrade is a transfer of login rights, which means that when players upgrade to the PS4 version, they lose the rights to access the PS3 game, unless they buy another copy.
The upgrade will result in the player's login rights to A Realm Reborn being bound to their PS4, and effectively eliminates the need for an additional upgrade fee.
Final Fantasy: A Realm Reborn is a massively-multiplayer online role-playing game from Square Enix that launched worldwide on Windows PC and PS3 on Aug. 27, and will launch on PS4 in 2014. It is a reboot of Final Fantasy 14.