heres what ign says about it:
Shaun White Snowboarding
Developer: Ubisoft Montreal
Publisher: Ubisoft
Release Date: November 16th
Genre: Extreme Sports
What to Expect: EA Vancouver, you have only yourselves to blame.
Those of us still enamored with the SSX franchise have had to wait
years for a proper snowboarding game to give us reason to ditch the PS2
backcountry, but given the kind of scope and scale that Ubisoft
Montreal is seeking to provide with Shaun White Snowboarding, we may
finally have good reason to move to a different set of peaks. 
It's not 
just that there's a whole mountain to ride
around on -- that much has been done before -- it's that you can do it
with friends. All the time. Get off your board, go explore, and if/when
the urge to race to the bottom or enter a trick competition solo
strikes, both (and more) can be done before seamlessly dropping back
onto the ultra-populated mountain. Built off the unlikely skeleton of
the Assassin's Creed engine, Shaun White Snowboarding certainly has the
ingredients to help slake our thirst for all things snowboarding...
even if we're probably not going to be disconnecting from our boards
and break dancing while hitting huge jump... at least not for a while.