The real future of Naval Air is under construction at Newport News Shipbuilding and Drydock in Newport News, Virginia, in the form of the USS Gerald Ford, the lead vessel that will eventually replace the Nimitz hulls.
The Ford Class will not have steam catapults at all. Instead they are being outfitted with EMALS, the ElectoMagnetic Aircraft Launching System that has been under development and is installed at NAEC Lakehurst NJ. EMALS gives a more even and controlled acceleration to aircraft and is infinitely easier to control for aircraft just like the X-47B as well.
Think about how much weight you take off the hull by removing the steam catapults and replacing it with electrical load instead. The Nimitz reactor plants were built to put out high volumes of hotel load steam for the cats and the ship propulsion system. The Ford Class reactors are smaller and built to produce high volumes of electricity, both for the EMALS systems and the main propulsion which will be driven by electric motors instead of steam powered turbine and gear reduction systems.
Revolutionary design on the Ford, and worth checking out some pictures about....