Yes I know it's the only aircraft you can stick 489 pax inside 3 class or 604 1 class.
Just seems a lot of weight to lug around for not a lot of extra profit/environmental benefit, if any.
In QF's case the A380 in 4 class is better than their 747-438ER in 3 class on the LAX run.
But if you compared lts/pax the 4 class 380 is about 552 lt/pax and a 4 class 777-300ER would be about 545 lt/pax. And it could carry some freight on top of that number which the 380 cannot.
Anyway, doesn't matter, I'm sure it'll be a wonderful Aircraft for the Pax and crew to ride in. Should be lots of room to run around in.