With people using Skype and Hangouts seamlessly as text and Periscope and FB Live blowing up, I think Dorsey’s hunch is a good one.
People have loved using Twitter to comment on live events, large and small since its inception. Latching on to live video leverages Twitter's roots while aiming it toward the thing that's taking off like a rocket. What else would he do?
And, happy anniversary to Twitter. People love it and hate it, but I've met great friends and conversed with famous people I would have otherwise never met being forced into 140 character expressions. Who would have ever dreamed of such a thing.