Speaking as somebody who has flown one regularly between Australia and the US I'll really miss them when they go. They were a much nicer, quieter, smoother experience than the 747 or 777 - though the 787 is almost as good and I guess that'll be the way forward...
I had hopes for a 787 from Sydney to Seattle and Chicago direct but I imagine that sort of expansion is likely off the cards for the foreseeable futute...