By Cam Vigliotta On a recent evening in New York City, I stepped out of our midtown office to find myself wading through a stream of stimulation. Businessmen in tailored suits hurried to the subway while tourists posed for pictures amid glowing billboards and ads. Street performers danced to music, applauded by a growing crowd, and food vendors hawked quick bites for the hungry. As I stood on a street corner waiting for the signal to change, a curious site passed by. Sleek and stealthy like a shark drifting through a school of fish, a limousine traveled quietly down the street, its windows tin…