This is certainly going to be an interesting route to watch over the next year+.
DL is making a play to move upmarket by putting some 763's with flat bed seating on the route, while converting the 752's to flat-beds starting in Q1 2014. This is coupled with the T4 renovation.
UA is downgrading the route, if I recall, giving up P.S. product. Edit:
link here . Going to 2-class.
It will be interesting to see if 2-class (DL, UA, VX) or 3-class (AA) is going to win out in the longer run. I don't know if media/corporate contracts are enough to support so many FC seats on this one route, but obviously AA is betting that a number of big customers will continue to pay the premium over J (even with flat-beds).