Hey there, this project is still the planning phase, things like full NPC's, player models all that graphical stuff isn't nearly close to be complete, so the system specs you are asking for now are kinda of an impossible information to give since, like I said before, this project it's still in it's early phase planning.
But I'm sure that when it reaches it's 100K $ milestone (or even a bit before that) stuff like that, you know technical stuff will be revealed, hope I was of some help to you.
Any other questions, feel free to ask around in the forums, from what I've seen the community here is amazing and helpful.