Been rumored for months, but the beans finally got spilled (officially).
Horizon: Zero Dawn would probably be "fun enough" if it were just shooting robot dinosaurs with a bow and arrow, but it also has an incredible SciFi premise that is slowly revealed as the game progresses. Definitely worth checking out when it becomes available.
Also, it signals a significant shift in console exclusivity. I would expect a third-party developed title like Bloodborne to be a better candidate for something like this, but Guerrilla are Sony-owned, which suggests that we might see more PlayStation titles made available in the near future...hopefully.