Yes that WAS the essential point of the A380. The entire idea behind the design. Heres the problem however.
The entire dilema the A380 was supposed to ease it ended up making worse because of its size. 1, the thing is so big it taxi's like a beached whale and slows down ALL of the airports operations due to its stumbling around while taxi'ing. 2, Its so big it creates a very large air vortex that needs many minutes for the air in the runway path to calm down before the next airplane in the slot can take its place and land and/or take off. Maybe you havnt seen exactly what it takes to get a 747 in the air, or down to the gate, but I have. The A380 multiplys that by a factor of "X". All of which costs both the air ports and the air lines money because the extra seats it actually is able to fill isnt much more then the standard wide bodys.
Ive sat there watching the busiest airport in the world amazed such a complex technological dance can be controlled safely with so many machines in play. The 380 slows that dance to the point of distraction, and even worse, financial loss. Even in the huge Hubs the congestion it was designed to ease it actually ends up increasing. Life is cruel and in civil aviation the $$ is kind no matter what you call it. The 380 is actually only making money in high traffic regional routes where they can pack em in like sardines. In the Hub to hub routes, the ones it was designed for, its a failure. Even tho it has met or exceeded everything the design could be asked for.
The Emirates invested heavily in it cause they Loved the bling. And the are the first, the only, and the last, investing heavily in it cause they can only make money in it flying 800 Pilgrims to the Haj. They just ordered another 150 777's
http://www.reuters.com/article/2014/07/09/us-boeing-orders-idUSKBN0FE0QS20140709 The largest wide body order ever I believe. As for the 380 they are the only ones left on the ship, everyone is is canceling.
You're forgetting the essential point about the A380: It's a hub-to-hub plane. The big hubs around the world have limited slots available. You're not going to get two or three 787's into London or Tokyo on one day. An airline is lucky to get one single slot. The only way to increase capacity on your single or very limited number of slots at big international hubs is to increase the number of PAX per plane. That's why Emirates have invested so heavily into the A380, because they primarily do hub-to-hub international flights. They've even gone so far as to say that if Airbus makes an A380 Evo they'll replace their whole fleet of older A380's.
Heres a big Hub. Ive seen planes lined up like on a highway. Both on the ground and in the air coming in, every minute or two. Every runway either launching or receiving. And they dont like 4 engined gas hogs creating air vortex's that takes 10 mins to clear no matter what the bling and certainly not for 50 extra passengers.