Earlier quoted context omitted.
Air New Zealand is trialing this. I guess for a country with such distances to anywhere, not surprising they are pioneers in flight comfort. https://www.theguardian.com/world/2020/feb/26/lie-flat-beds-...
But it seems like this is in addition to a seat, not instead: > “The concept is designed as a pod you go to during the flight,” she said. “You will still have your economy seat separately for the other portion of the flight.” Which of course avoids all the regulatory problems of evacuation during landing, etc. But also must make it expensive -- if you are buying twice the floor area, then you could have a business cl…
That said seats that can fold into three level bunks could be possible, but airline has no incentive to make cheaper business class. It’s their best interest to make economy as bad as legally possible to force you into upgrade.