Everything visible inside the Bill Graham Center was installed by Apple. Most of the structure was built just for the event. They even bought all the seating — you should probably contact Apple if you’re looking to buy theater seating. Effectively, Apple designed and built their own custom theater just for this event. It looked great.
via Daring Fireball: Brief Thoughts and Observations Regarding Today's 'Hey Siri' Apple Event.
All’evento di presentazione di iPad Pro, iPhone 6S, Apple TV Apple ha curato anche l’allestimento interno del teatro, nonché audio e video.