Let's admit one truth, if these predictions of doom and gloom were made to play out in our lifetime none of the crisis mongers would dare bet their own farm.
Part of the problem is the climate system's own inertia; it may be that only now are we starting to see definable and recognizable changes. The majority of the more severe effects probably won't happen while I'm alive. However, I'm concerned enough (and hopefully informed enough) about this issue to think that my children and my grandchildren will be experiencing some of these more severe effects, and that bothers me. I also am concerned that there will be significantly less wildlife (globally) and coral reefs -- that the things they see now in aquariums and zoos and know that these animals and environments still are "in the world" may be drastically changed (even gone) by the time that they reach adulthood.