arinc
When you sit in any of the Y class sections on an A380 the aircraft "feels" no different what so ever to a 747-400. In fact my impression is that the rear section (18) especially has an almost cinema going feel certainly on the SIA A/C. toilets in abundance too! The Business and first class sections are however quite a bit superior to the aforementioned Boeing, from any airline I've seen.
Which A380 have you seen? If it is the SIA then that is only one carrier.
When the machine visited the UK last year, there were the reporters gabbing about how it
might be fitted with showers and
could have a gymnasium ... where have we heard that before? Well, with the 747 (various Mks) and the 346. The underfloor crew rest of the 340 has been touted for many things but it usually works for crew or cargo.
The salesmen are very smart at getting the best and most spacious fittings into the eyeball and then the carrier arrives and fits out the aircraft for revenue service.