[Rain Man]

Out of 49 votes so far, here are the things that a majority think will happen:

Chiefs win a Super Bowl
Massive earthquake somewhere in the U.S.
Humans set foot on Mars
Small-scale radiation dirty bomb set off
U.S. is no longer the most powerful nation

These are the things that less than 10% of people think will happen:

Anti-gravity brought into everyday use
Evidence of pre-Ice Age civilization
Major meteor strike kills 1 million+ people
Peaceful Arab-Isreali solution
Cessation of Islamic extremism and terrorism
Poverty is eliminated in the U.S. based on quality of life
Race is no longer an issue in the U.S.
House or Senate becomes majority female
Worlds ends according to holy predictions
Time travel to the future
Time travel to the past
U.S. splits into two or more countries

The biggest thing I draw from this is a pessimism that we can resolve issues of social concern, both internal to the U.S. and also external. What does that mean? Does it mean that we should redouble our efforts to solve them? Give up on them? Just work to keep them from getting worse? Or does it mean that they're not important in the big picture?

While it doesn't show up in my summary above, I also scan the full list and see some optimism about science. It appears that people are reasonably optimistic that science can make notable leaps forward even if mankind can't solve its social problems.