Here are a few photos of the National Genealogical Society Conference in Raleigh, NC:
FamilySearch (above), Ancestry.com, Footnote, ProQuest and other genealogical data providers do demos in the exhibit hall.
Here’s a bird’s eye view of the exhibit hall (it’s toward the end of the day, so not as many folks are browsing around).
Here’s another angle. You can see Ancestry.com’s booth at the top center of the photo.
Book vendors often bring boxes and boxes of county and family histories, how-to books, maps and other sources.