Live TV across the oceans is very hard. Direct tv/dish network is only available across the continental US.
B6 when flying to the carribean relies on movies stored on the IFE hard drives.
As for IFE coming to US. I have known about it for a while but now that Christ has disclosed it I can confirm that it is being worked on. Still to early for a timeline as most of the focus was on other merger related stuff.
Momentum on inflight projects was gone during the merger.
However there is a long list of many things that are finally going to see the light of day.