Check out this aerial footage from AppleInsider that shows the temporary building Apple is constructing at San Francisco's Yerba Buena Center.
Construction of the makeshift expansion began late last week, though the exact purpose of the build is unknown as workers have since erected barriers and covered the area with white cloth. With Apple primed to reveal additional Watch details at a special event on March 9, the company could potentially use the extra space for device demos.
Apple also built a large structure outside the Flint Center for it's Apple Watch unveiling. That structure was used for product demos.