It would be amazing for JetBlue to have such an awe-inspiring home.
Terminal 6, the current JetBlue home, is a dump at airside and barely adequate (although visually appealing) landside.
Such a project, although expensive, would be an amazing feat for JFK. Then, the only "old" terminals would be the DL 2 and 3 which are in dire need of replacement.
With the new AA terminal, the refurbished BA T7, the beautiful T1 and T4 and a new T5/6 combo, JFK would be a whole new airport.
This would also be a great goal for JFK should NYC be the host of the 2012 Olympic games.