This strikes me as a bit more of a sensationalistic story than it needs to be. Most domestic (US) aircraft have already gone through this to a degree.
Case in point, of all the 757s I flew on to Kauai and back on vacation, only 2 - LAX to Lihue and Lihue back to LAX - were listed as "757-Overwater" models. The rest of them were not equipped with the same equipment because they are generally not over water.
50 miles from shore on a passenger airliner at altitude? You are, for all intents and purposes over land.
Of course, based on my flight experiences where they are even trying to charge for soft drinks now I can't see myself worry too mych about *any* airline, since odds are I won't be on it.
I'll agree to pay a couple bucks for a can of Pepsi when they agree that my $1500 ticket will provide enough leg room to keep my knees out of the seat in front of me. And I'm a short guy!