Some airlines are looking into BYOD (Bring Your Own Device) which involves you bringing your own tablet/phone and the airline giving you somewhere to easily mount that device along with charging point and WiFi based content to watch.
Some airlines are doing away with in flight entertainment entirely. Having switched to Cebu Pacific as my preferred carrier between Doha and Manila for cost saving reasons, I have started bringing Velcro Coin Stickers onto the flight to fix my Kindle Fire to the back of the seat in front.
Quick, cheap and non destructive way of bringing your own device onto a flight. Load it up with content and sit back and enjoy your trip.