What premium would you pay for something like that? Say on a flight from SF to Tokyo (or some other long haul flight)
It would save a full day of recovering from a sleepless night cramped in a small airplane seat. When staying a week it would effectively add a day, and justify a 15% difference. And night flights are usually cheaper or sometime even the only option for remote destinations so I'd still take it at a 30% premium for some of the shown systems. It looks super comfortable and offers more privacy. (although you may not want people to have too much privacy on a plane)
Premium? Airlines can fit more people this way.
Which also means less airplanes sold…
It fits the same number of people in the same space, we shouldn't have to pay much of a premium.