Depends on how "real time" the information is, I suspect, and how often the airline updates each channel. There may also be some confusion if some channels give the expected "on" time and others give the expected "in" time - comparing the BA and BAA websites for BA flights is always a good recipe for confusion over that.
The more interesting question in my mind is this: If you've just been on holiday for a week, and you return on a flight that arrives at LGW at 0445, and a parent has to watch the TV at 0300 and leave the house at 0400 to collect you - isn't this just a self-perpetuating business on the part of the holiday company, as they've now caused
two people to need another holiday?
