As announced at Gamescom, you’ll be able to upgrade selected PS3 games to the PS4 versions for a small fee, meaning that you won’t have to wait until Sony’s new console launches to play the games, and that the graphical upgrade will be noticeable.
So, when you buy a disc or digital copy of Assassin’s Creed IV Black Flag, Battlefield 4, Call of Duty: Ghosts, NBA 2K14 or Watch Dogs, you’ll be able to spend £9.99 (or £11.99 in the case of NBA) to receive a download copy of the title on PS4.
You won’t be able to trade in the PS3 game, however – you’ll need that disc in your PS4’s disc slot in order to launch the game. This prevents trade-ins, so don’t expect to get a PS4 game for £15 in the case of Watch Dogs.
It’s not a code to download them, either – after activation on the PS3, you’ll simply go to the PS store on the PS4 and see the game at the discounted price.
Oddly, in the step-by-step instructions, Sony warn you not to have the PS3 disc in the PS4 before downloading as it could cause the game to malfunction. They might just be covering themselves here, but it seems odd that having a disc in the PS4’s drive while downloading could affect the install process.
This all sounds good to me – it’s essentially just like putting a disc in and playing as standard. You’ll only have a limited time to activate your PS3 copy, however, – until the 31st of January for Assassin’s Creed IV and Watch Dogs, the 28th of March for Battlefield 4 and the 31st of March for Call of Duty: Ghosts and NBA 2K13.
Source: EU PS Blog