I suspect it will be horses for courses. Where the extra speed will count, the Cruiser will prevail but at log-jam runway airports like EGLL the Airbus will be king.
Q.- will T5 have all the extra airbridges needed for A380?, will it be able to cope with 2000+ items of baggage all carouselling(is their such a word?) at once?
With the A380 we will have an aircraft that will result in an overhaul/change in airport procedures not seen since 1969 and the B747.