As an Apple Shareholder I'm thrilled to see my profits being applied to cutting edge architectural structures located, seemingly, in the middle of nowhere. Perhaps this will pay off in the long run, but really it seems like a vanity project to intentionally use difficult architectural designs for an office building. But maybe it will inspire the Apple workers to work harder or more insightfully or convince them to work for Apple a little cheaper than if they had to work in a normal box shaped office space.
As for being a green building, nobody who puts an office building in a place that isn't accessibly to public transportation can claim to be doing something "green". Nothing you do with the building will make up for the fact that every one of the employees is probably driving their individual car to the office every day. Cities are "green"; suburbs are carbon creators and energy drains.
But boy it looks nice, especially with the underground parking garages.