I'm not sure there was ever a firm commitment to the airplane.
It seemed obvious to most that the large airbus orders had options to shift between types as necessary. Emirates is dedicating itself to the 380 by investing heavily in the program and as long as the planes are full seems to be paying itself off. Other airlines are certainly struggling at this stage to make a 380 fleet efficient enough to order in large numbers.
The 350 delivery which was pushed further and further back to the point where it now encroaches on the 777-8/9 schedule and negated the 350's purpose somewhat.
It seems the whole EK fleet will settle at a smaller size than originally planned which can't be good for potential joiners... What will be the time to command now?