I agree with movies getting borinng after a while, but what about games (those with more complexity than solitaire)?
For example, there's plenty of RPGs of all flavors and settings that would have you exploring, conversing, and battling. Many don't have high system requirements, either, so could be comfortable to play on a netbook or tablet.
Edit to add another idea: I know some flights have games you can play with people in the seats next to you. Why not a plane-wide chatroom of some sort on a web portal? Then you could textually converse with many people without bothering anyone and without any bandwidth/latency restrictions.
For example, there's plenty of RPGs of all flavors and settings that would have you exploring, conversing, and battling. Many don't have high system requirements, either, so could be comfortable to play on a netbook or tablet.
Edit to add another idea: I know some flights have games you can play with people in the seats next to you. Why not a plane-wide chatroom of some sort on a web portal? Then you could textually converse with many people without bothering anyone and without any bandwidth/latency restrictions.