The way human beings have been communicated seems to be nearing the end of the circle. We started with sign language, then the lips step in, and then technology took over. Thanks to a certain Graham Bell, telephone became part of our lives. Look at the way mobile phones have made communication such fun. So now you can actually talk face-to-face with your friend, anywhere anytime, in real time.
The day is not far off when we could actually read each others' thoughts, and of course signs. That's the future of digital communication for you!