Here's a brief bit from a recent article from the magazine Conde Nast Traveller:
Air New Zealand is launching its "skynest" service, which includes six sleeping pods, that economy and premium economy fliers will be able to book in four-hour intervals on the airline's longest flights in addition to their regular seats. The lie-flat sleep berths will begin rolling out in 2024, when its eight new Boeing 787-9 Dreamliner planes begin to fly.. The pods will be located between Premium Economy and Regular Economy. Prices for the pods have not yet been announced.