I worked a full 321 PHL-LAX and we sold $300 in beverages including alcohol. Coming back to PHL, it was about $200. The problem going out however is that the Europeans are pi$$ed because they got off their flight from Europe, cleared customs, ran from the A gates and think they will get drinks and a meal going to the coast. Some have not even changed their money yet and have nothing to pay with.....and half (if not more) of our flight was Europeans. They are all dehydrated and tired and then we want 2 bucks for a bottle of water.
Some got smart and started asking for tap water which I happily gave them ---we all used to drink it 10 years ago so why not now???
Also, as far as this going away---I say no way. It will probably increase with us selling even more stuff like we used to---the power bars, cans of Pringles, etc. This is making the company money folks and I think other airlines will follow suit in a few short months since there has not been the riot that was forcast.
Bottom line---if US is the cheapest fare or we're the only ones that go where someone needs to, the pax will either bring a few extra bucks or purchase something in the airport. Selling bevs is here to stay---I myself think it is tacky and hate doing it but I think it's going to stick around.
Just my opinion.