If a child born today will be 88 in 2100, that child will have had an entire life to make the world a better place in 2100. It's his responsibility, not ours. The generation in power has to make sure things don't get FUBAR between now and 2020. The generation after that has to keep things intact until ~2050 and even the generation mentioned in the OP will really only be in control until ~2080. The succeeding generations will have a far better understanding of the needs of their time than we will. Our best thinking could create massive problems down the road. Choking, sooty pollution used to be viewed as a good thing, a symbol of productivity and advanced technology less than a century ago.
It's fine to think about the future, but thinking there is a lot we can do, aside from climate change mitigation, is false. Also, futurists need to really get off the idea of "exponentially faster" development. There will be no singularity.
Ah, I can see your agenda now, "aside from climate mitigation" how do you know we can mitigate the climate of an entire planet if we can't do other things like space travel? You want is belt tightening, reducing our standard of living in order to curb carbon-dioxide emmissions and for that we need rules and regulations imposed by the government to curtail our freedoms. So you don't want us looking to the skies with wide eyed starry wonder, don't want us building space ships and migrating into space, instead you want us down shifting our standard of living, riding bicycles, and recycling our manure for fertilizer and limiting our number of children to replacement values so we can live in harmony with nature, is that it?