Yoshida has confirmed on Twitter that all PS4 games will indeed feature PS Vita Remote Play. Says Yoshida, "Yes, it's true unless the game requires specific hardware like the camera. It will be great to play PS4 games on PS Vita."
The only exceptions offered by Sony Worldwide Studios head Shuhei Yoshida were, "unless the game requires specific hardware like the camera [PS4 Eye]." It also stands to reason that PlayStation Move-specific titles won't run via Remote Play, nor anything else that requires peripheral hardware (the Buzz! series, for example).
The PlayStation 4's Remote Play functionality with the Vita is said to be far more robust than its previous PlayStation 3 / PlayStation Portable iteration.