From an advertising perspective, there are almost limitless opportunities. Any logo, image or video can be projected onto the cabin interior. Cruising to peaceful skyscape background before descending into scenes from the destination country during landing. The safety demonstration video could itself become a projection, accompanied by sidewall lights flashing distinctly around each exit door.
It’s true to say that LEDs, central to this new technology, do offer much longer MTBF (mean time between failure) intervals and therefore much bigger operational savings. Airlines will see a quick return on their investment but should also make contingencies for life beyond warranties. The testing and maintenance setup requires significant investment in uniquely coded software loaded into bespoke hardware rigs and trained personnel to carry out surface-mount replacements.