One thing to note is that Toll has been gobbling up land lately instead of selling it:
their CEO called it "gold", and
they bought a lot in manhattan for $35 million just yesterday, and they have a site called
landwanted.net.
The demand is there for units under $200-$300 a square foot, depending on the view premium. I would very much like to think that a publicly traded developer will be able to pull something like this off here, especially with the economies of scale at their advantage--I doubt it's a phased project given how tightly the towers are placed.
It's not your usual entitle and flip case because Toll isn't exactly like a Peloquin or Pinnsoneault or any of the other bygone investors. They are a real developer with a track record. Their City Living division is their best performer.
As a more practical matter, despite the height, the site is not that well entitled. It's C-1, which allows them to build very limited commercial uses and they actually downzoned from C-2. They are not seeking to modify conformance to the siteplan, a mere $1000 gamble as far as the application fee is considered. The site is of very limited value to any other developer besides a developer like Toll because the entitlements only allow what is proposed, and I doubt Toll is going to bail out to an exact competitor.
My guess is that it will be the first to market in 5 - 10 years and then nothing else like it will be built for a generation.