The long-term future tag is meant for discussion of what the long-term future might look like. This doesn't necessarily overlap with the longtermism tag, because a post attempting to e.g. model the future of space travel won't necessarily discuss the philosophical implications of its model.

Bostrom's typology of possible scenarios

Nick Bostrom has identified four broad possibilities for the future of humanity (Bostrom 2009).

First, humans may go prematurely extinct. Since the universe will eventually become inhospitable, extinction is inevitable in the very long-run. However, it is also plausible that people will die out far before this deadline....

(Read More)