Don't undersimate the power of 140 characters. It helps you convey your thoughts. Take Plato's Republic as an example, most of the conversations could have happened in twitter-form, and not much would have been lost (assuming that some replies would be two or three tweets long).
Perhaps The Republic would have been even better in tweet form, because all the bits where someone says "yes, Socrates" could have been replaced by simply favouriting a tweet.
