Meet Emily - Amazing Lifelike Animation (High Resolution Video)
Sponsored link:

Yes, she's fake. She "is" the demo. Until the 1:30 mark, when they revert back to the real actress, her face is being simulated by the technology.
                                                                                                                                                        Too slow? Switch to Low-Res Video.

Sponsored link:
Please share: 

Definitions: MoCap (motion capture): the process of recording movement and translating the movement onto a digital model.
Facial Rig: "Rigging", also called Skeletal animation, is a technique in computer animation in which a character is represented in two parts: a surface representation used to draw the character (called the skin) and a hierarchical set of bones used for animation only (called the skeleton).
More info: Official Website: Image Metrics   Article: The Times Online