Earlier quoted context omitted.
As far as I can see this is exactly what is happening. More powerful computers and communications are amplifying the power of individuals, and as a result making relationships even more important. And cities have always been the places of innovation and relationships. Just even more so now.
But it's not just cities. Philadelphia and Baltimore and Atlanta are big cities, but they aren't the right cities. It's a small number of them. It's not just urbanism, but also brand.
I'm not saying you're wrong -- far from it -- but the brand has been there for longer than the phenomenon we're discussing here. Perhaps the tech has just made it even more pronounced.