You can find it on Apple’s website by clicking here. Just make sure you have QuickTime installed, or a similar player that supports QT files. Apple loves QuickTime.
Personally, I felt like the event was a bit rushed. But Apple did make some huge announcements today: the iPhone 5s, its first handset made of plastic, iOS 7, the biggest update in the platform’s history, and the iPhone 5s, the only currently-sold smartphone to offer a built-in fingerprint sensor for fast and secure sign in.