I am always skeptical of doomsday scenarios. Bad times are the way of history. People will just roll with the punches.
However, when I think about the future, I think about Solar powered cars, cleaner oceans, renuable energy, affordable techonogy for all, no paper books, no paper money, artificial habitats for species once on the brink of extenction, but when I think about people, I do draw a blank.