> It’s entirely possible Russia will find itself with a pacific warm water port.

You are 100% right. Yes, some people could believe that huge mistake.

Global effects will still catch them. The atmosphere and the oceans are global systems that don't care about frontiers. Warm oceans in Russia means extra hot waters in the equator belt, that means Hurricanes on steroids. This nice Russian port in Putingrade could be destroyed each year by the extreme weather. And nobody could navigate safely in huge stormy areas of the oceans.

> Perhaps tons of tundra frost will become fertile farm land.

Perhaps we will find that the peat soil starts releasing methane at a level never seen before. And that we enter in an unstoppable cycle of global extinction, just after dismantling science for fun. Weee!. This planet has resorted to that nasty trick a few times before.

Once it starts and self-feeds there is not enough money in the planet to bribe the ecosystems. They will fall until the next stable level of energy available. A level that may grant, or may not grant, minimum conditions for plant survival. Humans can't live without plants.

But a few rich choosen ones will go to Mars, party all night and it will feel like a Tattoine's adolescent dream!

Being rich only works if there are a much bigger amount of people that fix your needs and breeds your food. Money in Mars can't buy you a tuna sandwich when all tunas went extinct. Mars will became a very disappointing place in no time. A place that hates us with passion, with probabilities of survival abysmally lower than the earth. This people will be done the first time that the life-supporting machines will fall. Something that would never happen in the Earth.

The earth? will be fine. Go fast-forward several million years in the future and some organism will be seen traveling in machines fueled with petrol made of human corpses.