432 Park Avenue,. still in the planning stage, will tower over everything else in its neighborhood and most of everything in New York at 1300'.
Of course, we're talking residential.
The Liberty Tower, at approximately 1776', will still be substantially taller. Just for comparison, the Empire State Building is 1250' tall if you don't count the lightning rod, and 1454' if you do.
The world's very tallest building, however, dwarfs everything in New York. It's the Burj Khalifa, it's in Dubai, and it's 2716' feet tall. That's more than half a mile.
Here's the link to a Wall Street Journal article about 432 Park http://blogs.wsj.com/developments/2012/05/29/details-revealed-for-super-tall-tower-in-new-york/?KEYWORDS=432+Park+Avenue