The sexy shaft design was also 1550' high I remember. It had an open sky garden at the top with miniature trees, although that would hardly have been practical in reality. I think the garden was a tenant amenity rather than a private penthouse perk. Broo-Hoo to that I wouldn't wanna share my garden with those folks who only paid 40 million for their apartment!
Extell still have their supersite in assembly further down the island near the theater district. Would be nice to see something inspired this time.