Some low cost airlines no longer have anything. A small fold-out tray to hold your tablet. There is Wi-Fi to access an intranet with flight information and maybe some entertainment. If you have that, you just load it up with games from your play store.

I prefer the Airbus 31x and 32x models without the entertainment systems so much more. On United the Boeing had fucking ads playing NON STOP THE ENTIRE FLIGHT and because I boarded early I'd try to turn off as many around me as possible because somehow the flying public does not mind bright flashing annoying lights in their faces for HOURS.

This is increasingly common in domestic US full-price airlines. It makes sense, in a way - most folks have their own devices, and the airlines save money and weight and don't have to worry about future tech obsolescence - but still makes me a bit sad.