Sony Computer Entertainment President of Worldwide Studios Shuhei Yoshida has confirmed the PlayStation Vita can only be used as a PlayStation 4 controller for games "specifically programmed" to utilize it.
The clarification came via Yoshida's Twitter account, when a user asked if PlayStation 4's portable buddy could be used as a secondary controller. "In a normal sense, no," responded Yoshida. "Unless a game is specifically programmed to allow such use of PS Vita."
@InsideEddie Hey BRO! In a normal sense, no. Unless a game is specifically programmed to allow such use of PS Vita.
â€” Shuhei Yoshida (@yosp) July 26, 2013
While not every PS4 game will take advantage of the Vita in this way, Sony is still promising that virtually every PlayStation 4 game will be playable on the handheld itself via Remote Play.