I would actually be fine with a modest slowdown that relieved pressure a bit in cost areas. When things slow up, there's typically a flight to quality, an increased awareness of where the money's going rather than just throwing it at every fly-by-night proposal that shows up.
And I think a proposal like this represents some of that shift to quality from quantity. I think many of us skyscraper fans would happily trade three 400 footers for one 800 footer. Sure, a quantitative market analysis would show a 33% reduction in units marketed, and therefore a slowdown. But a qualitative analysis shows an extremely tall luxury condo building in the heart of a bustling city.
If the market setled down to a steady pace of 2 towers of this type per year, and little else, I would find it hard to be disapointed.
(Appologies for the analytical nature, that's what happens when you check in after working on a master's term paper)
Big building tall. Way cool!!! - Ah, better