the elemental demo doesn't look quite as impressive as the first video of it, because for the SDK package they compressed the textures a lot (well, nobody wants to dl hundreds of GB just for a self running demo I suppose) and it's (sparse voxel octree) global illumination is deactivated which makes the lighting look less natural (essentially on par with the PS4 version that was shown)
by the way, U4 SDK users compiled several versions of these tech demos, which can be run without owning the SDK







