One of the unanswered questions of the just announced Apple Watch was this: How would people communicate with such a small screen? Now we have the answer: with "digital touch," a program that encourages communication without words.
Rather than attempting to, say, text a message on the watch, you can tap a message: the watch can detect when you push its pressure sensors, then buzz the device of the person you're talking to accordingly.
Apple's also programmed custom emojis into the watch, if you want a little more nuance of emotion in your conversation. If you need something a little more complicated than that, you can also draw out a simple message right on the screen.