There were several posters at the conference though. Mine reported on using the web to provide interactive university-level courses, based on a summer project at the University of Oslo, Norway. I also demonstrated "XHTML" which extended HTML with semantic tags and mathematical visualizations. I still remember another poster showing how a web browser could be used as an alternative UI for the filesystem and OS.
Ted Nelson, who coined the term 'hypertext', said after his talk that he thought the web was an excellent step forward. By the next year it was everywhere. Twenty years later, many of the good ideas from back then are mainstream.