I see rapid decolonization. Japanese leave rural areas and northern territories. Russians fled Central Asia, pushed off Caucasus, large swaths of land become anthropic deserts. French in no position to colonize Africa anymore, if anything they're getting colonized. Chinese flock to Southern coast and no longer push that hard demographically on Uighurs/Tibetans.
Germans don't even seem to flock to their Northern, Baltic shore. And it has better climate than absolute most of their supposed "sraum".
Arguable, Polish and Balts skip their countries for greener pastures. If anybody in EU will be lacking room they can move there any minute.