"Bigger picture"
If one would want to analyse spatial distribution of population and industrial jobs in America he would be surprised. 90% of Italian industry is located in it's capital and surrounding counties creating huge magnet for residents of underdeveloped rural regions which is...well basically everything else. So there is no doubt where power center of South and, maybe even whole America is.
Norwegian America lacks clear center, various cities compete for workforce and government funds and while Syracuse is ahead, even it doesn't reach 15 IC mark. Despite it's low population this continent has exploited it's significant natural resources better than, lets say China, and that is it's biggest advantage.
Asia has always been most populous continent and as such it was inevitable that it will one day rule the rest of the world, assuming it is spared of bloody strife between it's various inhabitants. During industrial revolution 3 core areas emerged. One of them is Japanese Islands, which currently holds about 80 IC total. Also 2 regional centers - Tokyo and Hiroshima is located here.
Chinese being one of oldest civilizations were rather slow to develop it's considerable human and nature's potential due to several bloody wars. But when it started, what a leap it was. In East China is located 2 cities with continental significance. Goods is transported by countless canals and rivers, Huanhe and Jandzi beeing most important, to distant markets overseas and developing cities further inland.
Thirdly there is Indonesia. Country of humble origin have conquered what is most of SE,S Asia and Australasia. These conquests, have affected country more than one could imagine. No longer Singapore and nearby islands has such influence as it had 150 years ago. Industrial core land now is Ganges valley. Huge cities is situated here, by now it's hard to tell apart where one starts and one ends and whole agglomeration, called Rangpur exert world like no other, except, maybe Arequipa.
Georgia and Finland, both being huge countries, have expanded from one center that has continued to dominate. For Finland it is Novgorod, and later fertile triangle between Caspian see, Crimea and St. Peterburg.
For Georgia it is Caucasian mountains and Caspian shoreline. While none even thinks about swimming in Caspian sea due to horrible pollution from all the industrial complexes and fuel refineries around it, it still holds significant meaning in minds for ordinary Georgian. And not only Georgian, but Persian, Turkmeni and Finnish too for it is what unites them (because Georgian railroads is so terrible that ferry is often safer means of transportation
)
Considerable decentralization makes defining European industrial core very hard task. If I would have been forced to describe it by one word that would be France. Foggia is only city with continental significance and is most likely to retain it's position. French industrial centers is wide spread denying their opponents ability to take it out with one, well aimed stroke, but also forcing them to defend everything except maybe Mediterranean coastline - that is if alliance between those 2 countries becomes a reality. African warlords have taken great care to develop each it's tribe equally making war in Africa very logistic intensive and relatively fruitless. Most of industry is no further than 200 km inland, though.
While Norway has claimed that it's power center has shifted to America it's European territories still holds impressive amount of industry, especially British isles. One has to wonder what would hurt them more - loosing American, or European territories ?
Of German speaking countries only Germany is worth mentioning. It's core areas is in northern part of country, where terrain is better for agriculture and supporting huge populations. Of Prussian cities only Prague is close to 15 IC, but doesn't quite break that limit - industrial development here is mostly thanks to German eagerness to exploit considerably lower wages just across the border.