Sadly, we can hardly see them in actual gameplay videos now.
We can't see unlimited particle FX lighting. We can't see HDR flares. We can't see fog shadow. We can see pixel accurate displacement mapping. But only 1 or 2 object using it. We can't see tessellation very much. Very few. We can't see even tessellated brick wall. Crysis2 had much more.
I hope release version have all & much much more. But I doubt it.