Most airlines are not even filling their 747s at the moment so the A380 will only be a success in certain markets (like Singapore where the aviation market has grown exponentially). The A380 is the right aircraft in 10 or 15 years time when the industry will have grown considerably but it is not the correct aircraft for the present times - too big, too many unfilled seats.
According to the article in a recent Flight ALL current A380 operators are reporting very high load factors on their A380 services.