Saw this mpg for a new game engine in development and was amazed. So many polygons!
If you have a fast internet I recomend looking at this site and the engine demo mpg (30Mb).
Still not 100% in some areas (too much movement in the reflections of the leaves, grass does not all move in the same direction) but breathtaking none the less.
Can't wait to play games like using these type engines.