Color me skeptical ... but there are a number of assumed developments that somehow appear to me to be more wishful thinking than real possibilities. Call me a Luddite if you wish, but somehow pouring emotion or resources into these chimeras seems to be somewhat futile ... at least for the next few hundred years. Here are my top ten candidates:
1) Colonizing of Mars or other planets (or even commercial space travel)
2) Effective world government
3) Our current existence being just a simulation in some giant future computer
4) Human head transplants
5) Being able to control our climate
6) Humans defying death ... or at least living for many hundreds of years
7) Ubiquity of self-driving cars, trucks and buses
8) Resurrecting of frozen corpses
9) Even close to sufficient sustainable energy production from wind and solar
10) Robots taking over from humans (or killing us off)
