aside from the mountain of licensing issues, which country would you want live tv from? if flying TATL there would either be nothing on tv overnight, or during the day it still would have nothing on until the later half of the flight presuming you want US live tv.
and if they offered US why not UK? i could spend an entire LHR-SFO watching reruns of Four in a Bed on Ch4. the height of british passive aggression.