Personally, I prefer the smaller 787, long distance flights without having to have layovers and changing flights.
I know these claims of exercise lounge and bars will give into seats. The original 747 had a piano bar and lounge located in the upper bouble. I challenge you to find a 747 (besides Air Force One) that offers these.
And if the Airbus 380 does have these, it will be restricted to first class passengers. Imagine a line of 100 people wanting to use a treadmill and shower, I'd hate to be the last one in line.
Terrorism: Why blow up a plane with 200 people when you can blowup one with 600 people. Airbus 380 will be a prime target for terrorists. Like AQ's plane to blow up 8 planes over the Pacific Ocean. They were planing to blowup the bigger planes.
While airport screening in the USA isn't as good as it should be, it is still better than Europe and the rest of the world. Even after 9/11, I had a metal fork and knife on an Inter-European flight. I then flew from CDG Paris to the USA, where I was stopped and searched for 20 minutes, without checking my shoes. I had to have my shoes checked when I arrived in the US, before I could even get out of the International terminal.
The next day the same Paris airport, same airline, let Richard Reid, the UK shoe bomber on a flight to the USA without checking his shoes.
Yeah, I am paranoid, but I won't be flying on 380's till the rest of the world catches up on airport screening.