Ever heard of north passage opening? Basically main economic oportunity for Russia other then its raw materials?
Yes, that would change geopolitics dramatically. That also probably won’t happen for a few decades until the ice caps melt a lot more, though.
For now shipping services between Europe and Asia via the North remain limited to a 3-4 months summer window, but as sea ice retreats earlier in summer and returns later in winter more operators will surely look to the Arctic for new opportunities.
Like I said. In a few decades the Northern passage will just be an open sea route most of the year.