Will this benefit the A380 or would it matter ?
According to the public Airbus data it will be long enough for a full-MTOW A380-800 weight-variant 6 ( 573 tonnes MTOW ) on a standard-ISA day. I believe that is Emirate's current majority version. It might just squeeze in the heaviest variant 8 at 575 tonnes but their public field-performance graphs aren't detailed enough to be sure.
Still, being able to handle ONE MILLION POUNDS of aircraft is impressive, assuming the taxiways are spaced appropriately and can take the weight.
Would anyone want to depart Dublin with an A380 at MTOW? No idea, but it could cover 8,000 nm with a full passenger load which from Dublin is enough to reach any capable airport in the World with the exception of Australasia.