GTA V certainly qualifies as a 'series of massive significance finally being confirmed for PS4'.
The statement alone tells us that we are expecting it on PS4, it just hasn't been 'confirmed' yet. OK, its no big deal for those of us that have played it but it'd be a pretty big announcement, especially with exclusivity, for the PS4.
Sega haven't made anything decent in recent memory and Nintendo characters won't appear elsewhere whilst they are still in the hardware business.
Suppose it could be God of War or Uncharted?