Boeing has the plane for MEL-DFW nonstop
with a full pax load, in both directions. The 747-8 range has been increased to 8300 nm (thanks to better than expected wind tunnel test results, I guess the wing is lower drag than spec'ed). Making the 747-8 a viable alternative to Boeing's current plane for that type of mission (the 777-200LR). It also makes possible a non-stop SYD-JFK flight. I have to believe that QF (and CX) will be getting 747-8s soon.