“Last Wednesday’s unveiling of the dazzling, but still-evolving 115-story hotel and condo tower marked a major milestone in an ongoing revolution: The skyscraper and the tall office building no longer are synonymous. For more than a century, they were. But as Calatrava’s design reveals, life and cities have changed and the skyscraper is free to adapt to those changes in stunning new ways. Though far from faultless, it is one of the freshest and most captivating skyscraper designs Chicago has seen in decades, fully taking advantage of the possibilities offered by the fact that it would be a place to live rather than work.”