During Sony's Gamescom press keynote, president Andrew House revealed a program that would allow consumers to upgrade from select PS3 titles to their PS4 counterparts for a "significantly discounted price." UK managing director Fergal Gara told Digital Spy that the pricing will be dictated by publishers.

"What will happen is, the PS4 digital file will be made available on the PlayStation Store - as it would be anyway - at launch, and the PS3 discs will be sold through retail. What the consumer can then do, for a premium to be defined by the publisher, is access the PS4 digital game and then provided they still have the PS3 disc, they will be able to play the PS4 version when they decide to buy the next gen."

Call of Duty: Ghosts, Assassin's Creed 4: Black Flag, Watch Dogs and Battlefield 4 are the first games eligible for this promotion. GameStop and Amazon both announced they will offer similar upgrade options for Xbox 360 to Xbox One games, though nothing has been announced from either retailer regarding PS3 to PS4 upgrades.

http://www.joystiq.com/2013/08/22/so...by-publishers/