Yes, it is a good thread. Perhaps I could broaden it slightly.
I can remember the 1980s when Britannia Airways (our usual charter airline then) had no inflight entertainment other than passengers bringing their own book or looking out of the window (this is still my favourite form of inflight entertainment which is why I like a window seat).
At some point in the 80s the airline began to install monitors showing current height and speed over ground which later morphed into live route maps.
The next innovation was a series of monitors slung from the ceiling showing all those old tv sitcoms and other tv shows I had made great efforts to avoid when at home - you will understand I'm not a telly person.
After that changes on aircraft became rapid with seatback screens, audio/vision on demand, games and all the things that we've become used to.
Last year I flew with Emirates and though I'm not a great user of inflight entertainment I have to admit that their ICE system certainly lives up to its billing as one of the best, if not the best, around.
Film, music and games fans have a great time with all this.
I did manage to find a couple of old black and white films (out of many many hundreds of films available within the system) that I enjoyed but I'm not a fan of modern films either - you will realise by now that I'm a bit of a curmudgeon when it comes to such things.That's why I like easyJet that has always turned its face against any form of inflight entertainment.
The one feature I do love is the provision of onboard cameras. Emirates aircraft are equipped with forward facing cameras (the pilots' view) and downward facing cameras giving an excellent view of the ground - especially useful after take-off or before landing. They can be accessed at will by each passenger.
Who knows what passengers will consider normal and expect in ten or twenty years - that is with airlines that are prepared to spend money on the latest trend in inflight entertainment.