They are very clever in the way they do 3D too...
They are using some soft of displacement map...but are still doing a single viewpoint and they are not rendering things twice.
They have already calculated the z position (in and out of the screen), so they just do some trickery with that (which only eats 1-2% extra instead of 100%).
Bravo crytek!
Actually, there is a saying...whats too good to be true, usually is. I wonder if thats he case here.
It will be funny to see if PS3 version of cyrsis 2 is locked to the new 3d TVs only. 360 should work on most 3D displays, hdmi 1.4 or not.







