Steady incremental increases in the somewhat distant future of global warming are not likely because its major cause, world overpopulation, will be greatly reduced by wars, disease, starvation and economic disruptions brought on by resources depletion and environmental stresses. The single largest factor that has fueled overpopulation has proven to be the failure to provide women with equal education and rights across the globe. And since the mentality behind this and other ills will not be remedied in time to thwart the multiple ill effects of excess population density, we will all be witness to the "train wreck" in slow motion that early stage global warming was only a feverish symptom of. In short, global warming is only the tip of the proverbial iceberg.
Note: Of course, if runaway global warming is triggered before the above happens, then Homo sapiens will have single handedly caused the Sixth Great Extinction that is the Anthropogenic Extinction.