User blog:Awyman13/SONY's PS3 to PS4 Game Upgrade Program

Sony announced at their Gamescom 2013 press conference that gamers that buy Battlefield 4, Assassin's Creed IV, Call of Duty Ghosts, or Watch Dogs on Playstation 3 will be able to buy the Playstation 4 Digital Version for a "significantly discounted price" once it becomes available. They also announced that the PS4 would release on November 15th in North America. Again it will have a price of $399 and PSN will also be a subscription service, similar to Xbox LIVE.

EA, Activision, Ubisoft and Warner Bros. were named as partners in this program. Presumably more games will be announced as part of this digital upgrade program in the coming weeks.