According to 9to5Mac, the new Apple campus will have a visitor center:
The observation deck and visitor’s center is a glass structure with a carbon-fiber roof and large skylights. The ground floor holds a 2,386-square-foot cafe, as well as a 10,114-square-foot store. The store will allow “visitors to view and purchase the newest Apple products.” Stairs and elevators will take visitors to the roof level, about 23 feet up, from which they’ll be able to view the campus.
That’s a bit of a departure from the current campus, which often feels a bit more like CIA headquarters. There is the company store, which sells Apple-branded merchandise that you can’t get anywhere else, but it’s relatively small. But it makes a sort of sense that Apple would want a more prominent public-facing section of its campus, even if—as this plan seems to suggest—the visitor center is distinct from the actual main building. As the company has gotten more and more popular over the last few years, I imagine more people have made the trip to Cupertino and expected to see something, but right now there’s not much there for them.