Just watched sony bend talking about this game in Geoff youtube show.
Keys points I got from the video:
* Game is heavily store focused single player only Action/Adventure survival game experience like of Last of Us in some ways
* Bike (focuses on bike culture) is really important in the game and he never leaves which is crafted and built by the player
* Set in Pacific High desert harsh volcanic place with caves etc,,
* Open world sandbox style game that can be fully explorable
* Has Dynamic day/night cycle and weather system
* Has RPG (crafting) elements and changes gameplay based on that, so player needs to understand the tools and environment
* World is dangerous compared to other zombie games out there as they say zombies try to kill everything that moves especially at night
* Game has been in development for 3+ years, but still its in early development as they just only finished core mechanics/ideas of the game and not ready yet
Everything sounds great to me.