I'm also wondering what effect it'll have on all the people that have been declaring their primary residence in Florida for tax purposes yet actually live up here in NYC a good amount of the time. My neighborhood in Brooklyn is filled with cars registered in Florida. If all of a sudden your pied-a-terre condo in Williamsburg is getting hit with $40k+/year in property taxes it might no longer make sense to try and move your residence to Florida to avoid city/state income tax.