The world wants to save money, so that it can make more money. Therefore the A380 will be in demand! The 747 showed how it could be made to work, the 76 and 77 followed in it's footsteps. It could be said that all the Airbus widebodies are a result of the 747.
Cathay Pacific currently have three rotations a day from LHR to HKG. That's every day at 18:25 and 22:35 (local) and one that varies from 13:05 to 21:30 across the week.
The two 'main' rotations are scheduled as 744s, this new (third) rotation varies depending on load, such as A340. However, on the days that it departs within one hour of another, it doesn't take much calculating to see where the savings are going to come from. I don't follow aircraft orders or production, but if CX have not ordered the A380 - I would be surprised!