New York's Billionaires' Row Booming

Looks like there is an influx of investment to New York's 57th St area (known as Billionaires' Row):

http://ny.curbed.com/archives/2014/12/16/live_on_new_yorks_billionaires_row_for_less_than_1_million.php

Retail space ernts have also gone up considerably:

http://therealdeal.com/blog/2014/10/30/retail-asking-rents-surge-on-57th-street-rebny-report/