Though I admit the game looks amazing visually, I have to say I think they've put FAR too much emphasis on something as trivial as "realistic" facial expressions during conversations. It really does nothing for me, and to be honest I don't really see how this is more "cinematic" than, say, Wing Commander 3 or 4. No matter how many expressions you can have your engine make, you will still need to record voice dialogue for the effect, so it's hardly all that useful.
Then again, if they've put as much work into the actual gameplay, I will be ecstatic.