This looks like it could be taller than the 47 floor, 5 Beekman nearby.
Until we get renderings, we don't know what type of crown or if it will include it at all, but this is probably playing around with the 700 foot range if not more.
Edit: Just saw Crawford post as I was typing this when he must of posted it. Good to know my speculation is on point though.
Great news. It will rise to an identical height as 5 beekman.