This is happening now, mostly in the US, and some planes may have satalite Wi-Fi in the future.
Vigin do it, JetBlue and some other airlines have got permission to do it, I'm not sure what speeds they get, but In-Flight entertainment, has always had, a lot of music channels, and the In-Flight movie since I have been flying, for almost 34 years, and longer.
Now most Airlines, offer, a back of the seat in front of you monitor, that has a choice of TV shows, Movies and music videos, that cover from 18 and below shows, no not porn mind thats for the Mile High Clubers, if they can get away with it, lol. These entertainment seat systems, have phones and a channel selector and a games controller built in. Yes I played Feeding Frenzy 2 on the flight over here! You need your credit card for phone calls and some stuff, but most is included in the cost of the flight. Some even have video players for First Class fliers with their lay-down to bed seats, so they are not restricted to the in your seat menu.
Now the future will include internet, will it be extra or included in the flight? We will have to wait and see, but some Airlines, who have frequent fliers, know they have seen most of the in-flight movies so have live TV shows broadcast onto the plane, for those, that want to see them. Some of this is done by internet connections/Wi-Fi.
So will there be XBox Live games hosted from the air, Play Station Network, Home connections, video chat etc, I hope so, at the moment, it is possible to see YouTube and have FaceBook on planes, but only over land, with satalite technolgy we may get them over the seas, and I am looking forward to it.
I'm surprized there are not LAN games on planes, though the losser could find you in your seat and try and throw you off the plane, lol.
Hey, I'm so tough, if I don't like an In-Flight movie, I just walk out!