Brookfield Place NY (formerly the World Financial Center) often supports interesting art projects, and this year they started a new and very cool holiday light show that's scheduled to run until at least 2025-Luminaries, by stage and architectural designer David Rockwell's company. It's really beautiful, and they did a very nice job on it. It runs pre-programmed light shows and then also allows visitors to "make a wish" by putting sending a color out through the array by putting their hands on a white monolith and then releasing it. It's pretty cool. The New York Times has more here, and Live Design has some information here.
I have many writeups of holiday light displays here.
I finally got a chance to check out Saks updated holiday light show, part of their "The Winter Palace". They did a pretty nice job, and it's an integration of several different lighting technologies, traditional holiday lights and also some physical uplighting of the building. The attraction is right across the street from Rockefeller Center and the Christmas tree, so try to go early or late in the run to avoid the selfie-stick wielding mobs of tourists.
I have photos from many holiday light displays in their own category here.