Should I go PC (i5-3570k @3.4, GTX760 2GB, 8GB RAM), or PS4? I have friends getting it on PS4, and I'd rather play a lengthy open world game on my TV, so I'm leaning that way. I just don't know if the possible (probably minor if there is any) graphical upgrade is worth getting it on PC or not.
I vote PS4. I don't think your specs are high enough to get a significant boost over the PS4 to outweigh all the other positives you have mentioned.