... Not exactly, but fairly accurate. It all depends on the exact region, because Siberia is freaking huge.
Somewhere, global warming would improve agricultural prospects, somewhere, it would dramatically lower the difficulties of mining and extraction of minerals and fossil fuels.
Somewhere, mainly in the western and far eastern parts, it would create a hellish yearly sludgy marsh. And yeah, infrastructure there would be absolutely wrecked...
it's a bit controversial, but the common consensus ( as my geography teacher told me, at least ) is that global warming would benefit to Siberia more than harm it.
That's not here nor there, though. We're gathered here for one common purpose: to watch traumatized teenagers piloting giant robots battle for the fate of humanity. Maybe for some waff, too.
Changes of that kind would neither make Russia the main superpower on the planet, nor would they kick it back into the Stone Age, so let's leave it at that:
Russia, Siberia, global warming, China, eh.
... Of course, we could always create a subforum to argue about it until we all get Tanged. I'm game.