Lufthansa economy-class sleeping area?

Recently on both Airliners.net and FlyerTalk.com there have been rumors floating around of Lufthansa introducing an economy-class sleeping area on overnight intercontinental flights. In an email survey that the airline recently sent out, one of the questions was:

To increase the travel comfort on intercontinental night flights, Lufthansa is thinking about a separate sleeping area within Economy Class. There, you would have the possibility to sleep in beds with an angle of 180° (Full Flat). This option could be booked instead of a seat.

In the future, when booking a night flight with Lufthansa from Johannesburg to Frankfurt, would you generally be interested in booking into the sleeping area instead of a seat in Economy Class?

Apparently Lufthansa also included a picture of the 'sleeping area' (see above; click on it to see the larger version). While it might raise some safety issues (could the bunks be occupied during takeoff/landing?), it certainly might be worth a try on a fifteen hour overnight flight, especially when compared to regular economy-class seating on Lufthansa.