This beast-like machine is the TRAX STI, the newest creation from DC and Ken Block. Basically, it is Block's standard Subaru WRX STI, except the tires have been replaced with snow cat tracks and an upgraded suspension better suited for the winter terrain.
Apparently there will be a matching sleigh to be pulled behind the car which is made to hold up to four snowboarders and their gear. Backcountry boarding just got taken to a whole new level.
As expected, a movie of this monstrosity in action is on it's way. In the meantime, you can get a sneak peak with this teaser video.
DC and Ken Block Introduce The TRAX STI Video Teaser [Snowboarder Magazine]