I greatly doubt that there is some technology waiting in the wings that will allow us to continue to consume as much as possible, as fast as we can produce it. Population isn't the only problem. The 1st world populations are more of a burden on the environment than the larger 3rd world populations.
Since the second world war, our economy has become more and more driven by marketing. Previous generations believed in frugal living. We now have an upside down economy which would be actually threatened instead of strengthened if its members chose to live withiin their means.
A technology to sequester CO2, or a technology to produce clean power, would be welcome. But it still would not allow us to overconsume without consequences.