Crews are putting up banners, signs, and other decorations to transform the Yerba Buena Center in San Francisco into an Apple auditorium for the March 9 "Spring Forward" event, where Apple is expected to offer a general update on its various initiatives as well as formally debut the Apple Watch, which will arrive in stores some time in April. As reported earlier, Apple is also building on an extension to the center that will likely serve as a showcase room for the press to try out the new Apple Watch.