Well, it is in no way comparable with the tech and details of crysis
I also hope that that isn´t the best possible setup for shadows, because those are much worse than what I already realized with gamestudio.
It features only few models, some strange brightness adjusting(?), a boring water shader and strange caustics. Nice is the LOD of the trees. But the trees are missing at least some basic normalmapping and where are the softbodies? Technically, it is actually quite boring and nothing fancy at all. But it shows well, how nice assets can make things look good.