Though the use of tilt-shift photography is nothing new, and it is often a gimmicky way to make pictures interesting this video is actually quite beautiful. It should be noted I don't believe that this true tilt-shift photography. The effect was post work I will assume in After Effects.
This is the Work of Sam O'Hara. Comprised of over 35,000 stills shot over a five day period.
In any case enjoy NYC in miniature.
The Sandpit from Sam O'Hare on Vimeo.