Google is showing us a demo of Android 4.1 (Jelly Bean) and one of the many improvements includes much improved voice search features. We all know how Apple has been promoting Siri to no end and this looks like a serious competitor.
The improved voice search includes functionality from their knowledge graph. For example, the presenter asked who the Prime Minister of Japan was, the phone brought up Wikipedia and read who the Prime Minister is. He asked for pictures of marmosets and it brought up pictures of the funny looking creature. Impressive stuff and we'll look to have a demo of it for you when we can.