Do we have anywhere a timeline of technology that takes us to 2084? That will help mapmakers and artists decide how things should look.
If not, I have some ideas
There are several future developments that could slow down technology that we find hard to imagine. For example, a global energy crunch combined with overpopulation would mean things are cheaper to do with people than with machines.
Collapse of the oil-dependent economy could cut funding for military research in most countries. (They'd use up their existing militaries in wars over the remaining oil, but they wouldn't invest in future projects like space lasers and stealth planes.)
There might also be a massive effort to stop ecological catastrophe. I'd love to see a geoscape map that shows the effects of global warming.
Colonies on Mars? I think a manned space program is unlikely even at this point. It's much cheaper to explore space with robots.