Passenger Beds in Airplanes is happening!

Airbus has partnered with France's Zodiac Aerospace to create cargo sleeper beds for Airbus A330 and A350.

They'll be available to airlines by 2020.

The mini-cabins -- or passenger modules, as Airbus (EADSF) and Zodiac (ZODFF) describe them -- will sit directly on the cargo floor and will not affect the loading of cargo and luggage.

Airlines will be able to swap the sleeping modules in and out of planes in place of regular cargo containers, the companies said.

"We have already received very positive feedback from several airlines on our first mock-ups," Geoff Pinner, head of cabin and cargo operations at Airbus, said in a statement.

Designs provided by the companies showed rows of double-decker beds on either side of a corridor. Mock-up drawings also showed larger spaces for families, medical care or meetings.

While the exact use and pricing of the berths is yet to be determined, they are designed to be offered as an add-on option on long haul flights for passengers who want to get up from their seats and lie down, Airbus spokesman Jacques Rocca told.

Passengers will purchase a regular seat on the aircraft, paying extra for a bed at a price to be determined by airlines. They would access the cargo hold via a staircase. Staircase down to the cargo area is nothing new as Lufthansa already has it onboard their A340's to access the lavatories.

There will be some disadvantages as the cabins will not have any windows.