If you're an organizer who gets annoyed with speaker, or a speaker made to feel superfluous, look away.  This medical blogger describes what happened at a professional dermatology conference at which the traditional "poster sessions" -- free-for-alls in extemporaneous speaking, where hundreds of scientists stand next to a poster describing their research, and answering questions from passers-by -- are replaced by a digital poster session, speakers not required. Some background for those in...