Supertall Residential Towers

Sure, it's a subjective question. Where I live, it's anything taller than four stories, at least in the local media's eyes. But from a real estate perspective, there really is a minimum number, and they are being built in record numbers in the U.S.
Apr 29, 2014   The Wall Street Journal - U.S. News
What is the best height to promote good urban living? It needs to be high to attain necessary density but not so high that it detracts from the quality of life, particularly for existing residents. In short, what is the Goldilocks height level?
Apr 26, 2014   The Guardian
As a Billionaires' Row of sky-high residences rises along 57th Street, towering above Central Park, Michael Kimmelman wonders if it's time to tame the "leggy, cloud-piercing, sliver-thin residential towers".
Dec 24, 2013   The New York Times
The number of super-tall residential buildings continues to grow globally, with top floor residences fetching nine-figure prices. Historically, the world's tallest buildings housed offices.
Aug 26, 2012   The Wall Street Journal
Matt Shaw updates the status of New York's efforts to catch up with the global rise in super-tall residential skyscrapers.
Jun 4, 2012   The Architect's Newspaper