So there's an old downtown and a new area of high rises.
You find that solution these days in some European cities that don't want to screw up their old cities. In Paris there is La Defense on the outskirts, a skyline comparable to that of, say Dallas or Houston. London has Canary Wharf, which helps to keep high rise development somewhat under control elsewhere in the city.
Those new skyscraper cities in Europe are usually pretty sterile. They suffer from modern zoning concepts, sci-fi spaces and huge-increment development. And it doesn't help that they are off to the side. People desert them as soon as they get off work, making them pretty much office parks with rail transit. Boring.