watching your show on your device uninterrupted,  say if you are a window seat.  Or maybe you want to circumvent potential double bookings of your seat and lay claim quickly to get any upper hand of being there first.

In my experience, being on a cramped plane in coach watching a show us far preferable and more peaceful to standing around in a crowded airport where you know you have to be alert to abruptly stand up, and go get in line when called.