If you have an Apple TV look for a new “Special Event” icon on the main screen and watch the show from there.
Here’s the fine print (from Apple):
Live streaming video requires Safari 5.1.10 or later on OS X v10.6.8 or later; Safari on iOS 6.0 or later. Streaming via Apple TV requires second- or third-generation Apple TV with software 6.2 or later.
Mom, you can watch it on your iPad.
I will update this post to include a link to the recording of the event as soon as Apple makes it available.
In case you wondered: no, I don’t know what they’re going to show us. But whatever it is, I want two of them.