US Airways may be the only carrier to charge for nonalcoholic drinks, but after reports of how beneficial the change has been, I wouldn't be surprised if other airlines pick up the policy. Flight attendants were initially resistant to the pay-for-drinks policy, and now it seems many of them are changing their tune about the $2 rule.
In-flight bathroom lines are shorter because fewer passengers are guzzling beverages, trash collection is less of a hassle, and aisles spend less time being blocked by the beverage cart. It seems like what is meant to simply raise revenue for a struggling airline has also become a lesson in consumption: people will consume something if it's free, even if they don't really need it. I wonder which airline will be next to nix their complementary drinks? It's just a matter of time.