"Two long-run trends have led to this fractured market. One is the revival of the city as the central cog in the global economic machine (see article). In the 20th century, tumbling transport costs weakened the gravitational pull of the city; in the 21st, the digital revolution has restored it. Knowledge-intensive industries such as technology and finance thrive on the clustering of workers who share ideas and expertise. The economies and populations of metropolises like London, New York and San Francisco have rebounded as a result."

Is this really true?

seems like anyone with an internet connection can interface with someone from SF or NYC