If you ever played in the sandbox editor its actually pretty large in comparisons to most FPS games. As for graphics theres photo realistic mods as well that do make it look far better then any game on the market models and all.
If Skyrim has similar faces i will be in love.. http://www.joystiq.com/media/2006/04/crysis-face_render.jpg
So it is very large in comparison to most FPS games... what about Fallout? As large as that? With as many collision objects as that? Not even close. So, why bring Crysis up in the first place?
Is that rendered face from a cut-scene, or gameplay?
I have not seen the "photo-realistic" mods, so I can't really comment on those, but then, these are mods, so... still, the meshes don't look all that.
Again, I don't really care either way. I just think people are going to be frustrated playing the game if they don't think the graphics are what they think as being "next-gen".