This year is the 72nd anniversary of the 1939 New York World's Fair, which can be seen as a virtual world of sorts, a glimpse into an imagined future that was full of promise and wonders. To commemorate this historic event, ReactionGrid has created a simulation of the Fair and is sponsoring a week of activities and talks about the Fair and its impact on society.
I really liked the Trylon & Perisphere, which featured such modernities as escalators , a model city of tomorrow, and modern lighting fixtures. You can see how immense the exhibit is by comparing the tiny dot on the Perisphere, which is my avatar.
Head to the official site for updated information on the commemorative activities, and how you can take part.