I wonder how much weather will affect the reliability? B6 admits that weather affects the DirecTV signal a fair amount. But quite often (most of the time?) aircraft fly above the weather while at cruising altitude. From what I read in the Boston Globe story, the internet link is going to be ground-based, which would seemingly make it very susceptible to weather, depending on the frequency.
Obviously, it'll be very cool if it works...... but as has been said, managed expectations are the key.