Well, we can already see some confrontations due to global warming up at the north pole. http://www.nzherald.co.nz/index.cfm?...jectID=9005765
. For the north the main issue is shipping lanes and ports, however just as temperatures are making the north more valuable the same will happen for the south...assuming global warming continues that is.
Part of the problem of a warming antarctica is just as it is becoming more habitable, the ice in antarctica will be melting and in turn raising sea levels. This in turn will result in lost of coastal land, much of which is heavily populated. So just as antarctica becomes more hospitable, the rest of the world will be feeling a scarcity of land and resources.