On the official website for the PS4, a section points to games being able to play your PS4 games on the go with the PlayStation Vita.
When the PlayStation 4 was reveal in February, chief system architect Mark Cerny was demoing Knack played remotely using the PlayStation Vita. During his presentation he said, “we would like every PS4 game to be able to use this service as we are sure they will, in time”.
On the official website for the PS4, a section points to games being able to play your PS4 games on the go with the PlayStation Vita. The quote reads, “Play your favorite PS4 games on your PlayStation Vita’s beautiful 5-inch display using Remote Play.”
Killzone: Shadow Fall is the game in the attached pic, so it looks to be pointing to Sony first-party exclusives. Until third-party publishers get behind this feature, I don't expect this feature to take for the PlayStation Vita.