Originally Posted by ApK
You mean the microphone in the google search field, like we've had in Chrome for a while? We've had that on my wife's pre-jelly bean android phone for a long while.
It's not quite the same. Pre-JB we had voice search, but JB introduced Google Now, which is far better than a simple voice search - it learns. For instance, if you look for bus schedules while at home, when you are at a bus stop it will automatically pop-up the timetable for the next bus. It will know when you're on your way home from the office, and will give you an estimate of the travel time, and so on.