This was just one of the many new features that didn’t warrant more than a sneeze at the end of the iOS 5 portion of today’s keynote, but it’s an awesome one: AirPlay Mirroring.
They didn’t explain the feature in too much detail, but the gist of it is mirroring your iPad display – whatever apps you’re using or videos you’re watching – directly to your Apple TV, wirelessly. Hard to imagine that it’ll be quick enough over Wi-Fi for you to, say, watch yourself cleave fruits on your TV while swiping away on your iPad, but it’s an unexpected and exciting new weapon in the increasingly-impressive AirPlay arsenal.