We’ve seen this symbiotic relationship before (think giant hotel anchored by a mall ‘concept’) but the way that this futuristic-feeling complex places a small galaxy of hypermodern, chichi hotels in orbit around the glitzy Crystals shopping center is a first. The uber-upscale spread includes the subdued, stylish Vdara , the hush-hush opulent Mandarin Oriental and the dramatic architectural showpiece Aria , whose sophisticated casino provides a fitting backdrop to its many drop-dead gorgeous restaurants.