Twitter will reach masses of people and they won’t use the same tools as we do. Twitter will replace SMS for millions of people because it is portable and archives across devices, you don’t need to remember a phone number and you are not tied to a mobile operator. Twitter will replace chat room too.
Twitter will still be dominant in status updates because it is the motherboard on which we plug in.
In a few years, we will laugh thinking we were updating our status manually, like today.
Corporations will have entire teams devoted to Twitter and status updates. For customer service per example.