I'll say the same thing now as I said last time these guys released a video: I'll believe it when I see them make a single blade of grass move, or when they place a single dynamic light source and cast a single dynamic shadow. Until then, this technology is awesome, but more or less useless.
Also if they actually make a scene with different things in it. Having millions of objects in your scene is not that hard if they are all copies of the same object. The old demonstration showed a bunch of repeated copies of a single object. This one showed a lot of copies as well, although not as obvious.
[0] not to be taken literally