Here is a promo and an overview video for Asperity, a new RayFire feature that adds more detail to geometry.
Evermotion - Making of The Weed Way
Evermotion goes behind the scenes on Yones Bana's image The Weed Way.
Pixar's OpenSubdiv Presentation
Here is Pixar's presentation of OpenSubdiv at the Autodesk ADN Conference.