Rockstar's upcoming L.A. Noire is getting a lot of attention, despite still being some months away from release. Some of that attention is purely because it says "Rockstar" at the beginning; more is a result of it's film-noire setting and yet more is likely a result of the "detectivy" nature of the gameplay.
Most, however, is quite probably a direct result of the striking animation and other game technology: trailers and in-game footage shown so far has been nothing short of mind blowing.
To help people grasp just how impressive what they're seeing really is, Rockstar have released a clip that explains some of the magical stuff you're seeing in their trailers. Check it out...