Two years ago I walked past the Midtown Manhattan Chick fil A corner store and it was crowded and past the lunch hour.
In my experience, the Midtown Manhattan Chik-Fil-A locations are always crowded with long lines.
This new location in Downtown is much larger with a lot more seating. It is located near the World Trade Center (you can see the new tower in some of the photos) and will be available to serve tourists visiting there, as well as New Yorkers working in the financial district.
Also noted it will be open Monday through Saturday, maintaining the tradition of closing on Sundays. Hope they are successful - I intend to visit!