[wildpeaks]

It could be an add-on for Business class (where you have more space to move), similar to how it's standard to get audio headphones in planes. It could even have the additional position tracking camera embedded in the front seat to make tracking more accurate.

It wouldn't have to be wireless (because you're meant to stay in your seat anyway) so that would solve the battery issue, or even simpler to implement: the headset could just have an opening for the power coord and let the user use his own phone coord with the regular power outlet (that way he can choose between wireless or wired based on his battery level & expected usage duration, without having to replace the seats, so that save implementation costs).

As for being brought back to reality, this could be a solution: http://youtu.be/fEiyzJDFiJI