Random thought, kicking around my head since last May.
Whoever manages to convince the Public Utilities Board of Singapore to switch over to waterless urinals is going to make a nice chunk of change. Not only does Singapore want to reduce the amount of water they have to pipe over from Johor, but they also have plenty of public toilets.
It couldn't hurt.
(Reminded of this as I'm reading Hodding Carter's Flushed: How the Plumber Saved Civilization. Light but amusing, although I disagree with him about the washlet. On the other hand, his description of the Caravelle makes me want to check one out.)