I haven't been to a single airport in the last 6 months over 35 of them which isn't using XP on checkin and gate dispatch also for flight status
How many times do I have to repeat myself ?!?
DO NOT compare yourself and your home PC with a large corporation with a large IT department that know what they are doing.
You don't know doodly squat about their network and you don't know doodly squat about their Windows 7/8 migration plans (which I can pretty much assure you they are almost certainly undertaking).
Just stop clinging on to XP.... there is no excuse for home users or small businesses to stay there.