Well, it's not like that's the only tablet available...The Galaxy tablets idea may be short lived.
I can see it now, does the company have enough vouchers to give to the unsatified passengers when they are not happy?You don't even need for the tablets to be stocked on the airplane.
Put up some RedBox style kiosks at the bigger airports. Rent them by the day, and the customer can return it on their way back.