Quantity of loss in the World Wars

So when the world wars are generally discussed, it is often said that a lot of economic, social, political and technological development was lost.
But what would this development look like in physical terms. Would there have been new cities in Europe? Or would it have been larger cities? What industries would some countries have gained? What would Dominions, such as Australia look like, if the empire hadn't lost so much, that could have been poured into the Dominions?