Concorde was in a very, very different category in may ways. Yet I still believe that revenue was covering operational costs when it was axed (and every effort made to insure it would never fly again - I'm not sure what was the impetus for that but this is not the topic at hand here).
As for the 380 I am sure it is a very profitable aircraft on the "right" connection (ie when full). How good of a job Emirates does on this is anyone's guess... Any yes it is a very nice ride passenger wise.
We are witnessing a poker game between Emirates and Airbus - future will tell who will flinch first !