Its a brand new game, not even done yet, and it asks for the specs of a computer 5 years old.
It isnt optimized well yet so it struggles a bit on weak computers, even though its not photorealistic graphics it has particle effects, lighting, and voxel type computations.

to explain the hardware, the current graphics cards are 3000 series, so its 2 series (where each series has 2-3 cards in it) old. New computers often have 64gb ram, 32 for budget systems. The game does not require that much, but they give you a number that supports windows hogging a bunch in the background, your other crapware that runs all the time hogging some (like steam :P ), and whatever other programs are running in the background like a browser.