I’ve visited the Expo three times so far (Springtime, the company I work for, developed the Swedish exhibition). For many people here, the Expo is a unique once-in-a-lifetime chance to experience foreign cultures, even if packaged as country branding efforts.
When watching the crowds, I get an impression similar to the one I got at the Beijing Olympics in 2008. The same scenes repeat themselves; the anxious waiting at the security checkpoint, the hurried steps to reach the exhibitions, and the proud and excited people having their pictures taken.

