It started as a travel adjunct which would be used to view movie clips, then became part of the PowerPoint presenter's toolkit but more recently is becoming a note-taking aid.
There's plenty of new discussions about the choice of stylus and I'm starting to see handwritten notes being forwarded.
It will probably still take some time to mature and of course a short note will eat up even more storage and bandwidth.
But I suppose I'd better get one of those styli now, because just writing with a finger somehow looks wrong.