I've done a few calculations. If 12 A380s were available all of the time, then it would be possible to maintain all of the current A380 routes, including QF7/8 and QF127/128, daily.
However, if we assume that one A380 was always unavailable due to maintenance etc. then with the current schedules, and assuming QF94 is able to quickly turnaround as QF93, then it would only be possible for the A380 to operate SYD-HKG-SYD 2 days per week on Tuesdays and Wednesdays, which are hardly the most ideal days.
In the short term, I suspect QF may operate the A380 to HKG on those two days per week, and if they happen to have all 12 aircraft available then perhaps a few more days, with the rest (or perhaps even all) operated by 747s with F - they will still have two for a little while (OJM and OEB) which aren't being permanently used on other routes.
In the long term though (2015 onwards, or once the non-refurb'ed 747s are retired) I think the most likely course will be for Qantas to operated refurbished 747s on the route, which unfortunately does mean no F. Unless of course they take delivery of 1 or 2 more A380s.