As much as I would like to take credit for guessing that they'd call it the A380, somebody else on that board came up with the idea before I did. I simply said that I liked the name based on their reasoning.
On the issue of casinos, gyms, etc. on board, don't count on it. As someone else on this board pointed out, what makes the airlines money are seats. Think about this, how many square feet would even a very small gym take up? Maybe 300 or 400. And how many coach seats could they squeeze in those 300 or 400 square feet? Probably 30? 40? more. If each coach seat earns the airline $500 on average (a low-ball guess on my part), that means they're missing out on $15,000 to $50,000 of revenue per flight. What are they going to charge people to use this gym? $1000 a pop? I doubt it. Even casinos wouldn't make money because they still take up a lot of space and people won't be willing to lose more than a couple hundred dollars on average per flight. If anybody thinks that the A380 is going to have anything other than seats (and maybe a small lounge for the first or business section), they are dreaming.