I came across a couple of rants (ironically online) about the pointless noise of social media and when I saw this analysis of Kodak and Fuji, I realized that Kodak fell into the same trap people fall into when they complain about how the internet has increased the proliferation of absolutely useless crap and mindless exhibitionism.
What these people don’t realize is that a tweet about the morning coffee is not really significant for its content. It’s the act that is the key – people are reaching out for a social connection, and as long as humans have this urge, social media will thrive. And it will thrive in shortform. Shorter attention spans may have something tangential to do with the rise of Twitter, but I suspect the real reason is that most people want short bursts of interaction that mimic conversation, not primarily one-sided broadcasts.