The Seattle World's Fair in 1962 was also called The 21st Century. The whole fair tried to imagine what life would be like in this century. I happened to get into this because I was reading a mystery novel involving that Fair. I got curious and went onto the Google Image search engine and spent time looking at pictures of it. I found it fascinating, both for what they got right and what they got wrong about our present time.
In studying the above image, right away we notice people certainly looked different. I was a freshman in high school then and this was indeed the way we looked. Look at the computer the woman is using in the upper left. This is evidently what they thought our computers today would look like. They also imagined their being largely office and secretary oriented as opposed to every person in the country being plugged into his or her own personal computer, tablet and smartphone. The main thing that still is right though is that there has to be a keypad somewhere, whether virtual or actual.
One big cause for excitement about the Fair was that the touch tone phone would be introduced there. While doing so, there was also a look at what a video hookup might look like in the future on one's phone. We did end up with this but our phone and video calls equipment look entirely different. Plus it is now built into all of our existing equipment. But this was at least an accurate prediction of where our interests were going. The new modern phone booths were also exhibited whereas nowadays you'd have trouble finding a pay phone of any sort. They are also very excited about vending machines. Although they are still around today, no one is excited by them. I had to laugh at the one girl carrying the sign asking if we are, "Longing for a simpler time?" Looking at someone with that sign from 1962 while I am in 2014, makes me wonder how much simpler she could have wanted it. We also see a huge extended family attending the fair together. The median age for men getting married for the first time in 1962 was 22.7 whereas for women it was 20.3. The latest figures available are for 2012 wherein men's median age for a first marriage is 28.6 while women's is 26.6. The divorce rate was very low then and very few people pictured here would have been on second or third marriages.
Incredibly, Elvis was a huge feature at the World's Fair because he decided to do one of those godawful movies of his there. No matter what you thought of him as a singer, no one took him seriously as an actor. Since he died relatively young though, he retained his iconic stature. So arguably he and the Space Needle are the commercial items which survived the Fair the longest.
Today this Fair would have people of all different colors in it and the younger ones would be mixing the races together very easily. Gay people would be more openly so in this crowd of people too. There would also be more handicapped people in attendance and special provisions for them would be in place. You would see just about everything in clothing, hair, makeup and accessories. There would be plenty of nerds and, standing right next to them, people in purple and green mohawk hair dos.
As for what we'd be predicting for the next century, I am afraid that our thoughts are mainly about Dystopian Societies. So either a Zombie or Climate Catastrophe Based Society would likely be on display.