In my opinion our future is doomed. We've already polluted the Earth and soon we will use all of it's resources. While it may be avoided in theory, in reality it's unavoidable. Our population is too much to handle for the Earth itself, soon there will be lack of resources and soon after that - water and food supplies. After that, maybe, scientists will invent something to travel to other planets and survive on them but only the chooses ones which basically means rich people will ascend from the Earth. Probably there will be a riot when other not-so-rich people will discover that they are left as a waste on already overpopulated Earth.
Rich people will be killed, there will be anarchy. We all will die either via food and water lack, self-destruction of Earth or changes in climate via global warming.