What amazes me the most is not only PS4 is capable of handling all this (and whaever engine Sucker Punch is using), but the amount of detail they jammed to this open world game. I'm wondering how much work was required just for preparing resource for graphics, like models and textures.
It's quite baffling! 80 people for 2.5 years on an open world game and they had time to put in a smiley face on some random chair!
Courtesy: Shin-Ra