Texting behind the Wheel

Now that most phones are equipped with voice texting (You speak and it types it for you) Most will soon be able to read text too you and perform commands like send, reply etc. I wonder if it will still be considered illegal to text when you drive? I know several states ban even hands free phone usage while driving but that seems like a slippery slope. Will carpooling with other passengers become illegal since it will tend to merge to the same thing talking with another human being while driving.