The PS4 share button will not be a universal application, and can be blocked by developers.

That's according to Sony Worldwide Studios president Shuhei Yoshida, who told 4gamer.net that his decision to implement the application was inspired by his passion for Dark Souls.
But what in-game footage a user can share will be determined by developers, he said.

"There will be parts of a game that the maker does not want people to be able to see," he said. "For example, on Vita, developers can in certain scenes disable the feature that lets users take a screenshot, and [the Share function] will have a similar mechanism.

"The creator may not want to make video of the final boss sharable, for instance."

Elsewhere in the interview, Yoshida admitted that even internal Sony studios initially had trouble developing for the notoriously difficult PS3. He

"It's difficult to believe that games like The Last Of Us and Beyond: Two Souls are running on exactly the same hardware as those early games. Those developers have studied hard to make a great PS3 game. But it's taken a long time (for developers) to reach this point."

The PlayStation 4 is expected to release globally in 2013.