The hours of video consumed globally on Xbox LIVE increased 140 percent from 2010 to 2011. In December more than 60 percent of U.S. Xbox LIVE Gold members used entertainment apps on Xbox LIVE – for an average of an hour a day each. The number of people using entertainment apps on Xbox LIVE increased by nearly 50 percent globally from November to December.
via majornelson.com
One big reason for this is the new Metro design based XBOX Dashboard which puts entertainment to the center.