Maybe for a month... then it's time to replace that heavy, highly flammable and non-revenue generating piano with lots of seats to stow paying passengers. All the lounges on the upper deck of the early 747s lasted a very short time. My mother still remembers when KLM had a "club" for first class passengers upstairs where they could properly dine, socialize etc. etc. but it only lasted about a year.

All those Airbus mock-ups with first class seats bigger than Louis XIV's poster bed and enough space around them to play tennis are rubbish... the first class seats might get more spacious, but nothing like that.

Would be nice though, a piano bar.... or even a tennis court in the cargo hold. I wonder how the ball would behave in flight? Relative motion... probably no different than on the ground.

Will the A380 be quiet like the A340?