Be serious. You say American passengers are fed up and won't put up with it any longer? What on earth do you think they'll do? Lie on the floor and kick their heels? Start their own airline, PassengerAir? Refuse to fly?
Actually I think they will start looking towards airlines that offer service. We're starting to see the rise of all business configuration airlines over in the UK and corporate aviation is booming. People are fed up with being treated like cattle and have lost the choice between a Lo-Co and a full service.
I don't know what will happen, (if I did then I'd be a very rich man) but I'm fairly sure that the industry especially in the US, will change markedly in the next 10 or so years. With a recession on the way and the price of crude continuously climbing, the first people to stop flying will be the budget leisure travellers.