As the interior spaces decrease to a finer texture so must the contextual spaces - I propose creating open air malls through key buildings like 150 Sullivan an connecting all the hidden green backyard spaces creating through block vistas and pocket parks with small shops and eating places and clubs and artists studios an galleries and bikewpaths and farmers markets  - set up rooftop greenhouses that direct sunlight down into these quirky spaces - very similar in texture to Worth AVe in Palm Beach  FL - or Pearl Street in Boulder CO - building owners will get increased rental income and reduced energy costs  we will get a high quality of  LIFE EDITED.  absolutely critical to fulfilling the promise of this contest.A simple curved rail at each hall will create a wonderful atrium all the way to the roof - which will feature a skylight and solar engine that ameliorates the hallway ecosystem - hanging plants and fine paintings or murals will instill the feeling of luxury and save energy - climbing the stair will be a pleasure and the added open feeling insures safety and security because there is no place to hide. 
elegant windows superbly trimmed in fine mahogany mask the lightwell and contribute to the elegance.
I'm offering this as a separate entry because it applies to all entrants.