I don't have the required 5 points in the "far-future" tag to subit this as a possible synonym.
Synopsis of near-future:
For questions concerning the immediate future, where technology is assumed to have advanced slightly while still recognizable to modern humans. Questions utilizing this tag should focus on a particular technology and may be about a technology itself (how would this work) or the impact of a given technology on a particular topic (Society, Warfare, Economics, etc)
Synopsis of far-future:
For questions of Earth\humans that extrapolate beyond available data: hundreds of years at least, thousands commonly, millions preferably.
(although why "millions" is the preference is a good question...)
Those two tags appear to cover the entirety of "future."