According to 9to5Mac, the next major upgrade of iOS should provide the voice Siri to the Apple tablet. Indeed, Siri should make its appearance on the iPad with iOS 6.0. The interface will be redesigned to occupy only a small part of the screen like the notification center. The animation will be more successful and better integrated than the notification center.
Siri iPad offer the same functionality as the iPhone 4S and perhaps some new features that will include appearing on the iPhone 4S. We refer in particular to launch applications via a voice assistant or quick access to certain settings such as airplane mode, Bluetooth activation, etc.. However, it is unlikely that Siri makes its appearance on the iPad 2. It will be exclusively reserved for the new iPad.