Engineering360: "Airline Unveils Windowless First-class Cabins"

Hi there. True windows are physical traits of an airplane. Outside views for windowless passenger aircrafts while maybe more aesthetically and aerodynamically advantageous, will use lots of cameras and monitors. In turn, these cameras and monitors will use cables, photoelectric cells, sensors and a main processor to transfer data from cameras to the monitors.

During take-offs and landings passengers are required to open windows whose purpose is for the emergency/rescue/security teams to be able to see the interior of a "downed" aircraft. If the internal power of the aircraft is cut-off no internal view will be available. Conversely, if the camera and monitor of the "downed" aircraft are all operating, terrorists occupying a "downed" aircraft will see in "full clear HDTV view" what the rescue teams are doing outside to help the passengers. Anything can go wrong with electronics.

Moral: Don't "repair" a thing if its working.