If you are referring to the Samaritan demo :
That is called UE 3.5 by Mark Rein. And you know you can't compare PCs to consoles. Consoles are dedicated little machines that required little overhead for the OS and bloatware, while PCs need to handle quite a bit at the same time.
Another thing to keep in mind is Epic may scale down available features depending on the capability of the box running it.