It will not be implemented in SF because it's only suitable for men. Switzerland appears to have created a solution for women by providing disposable paper "funnels" so the ladies can use it too, but because people lack any decency they would all be stolen within minutes in SF--and if you think creating a male-only public urinal won't fly in SF, just wait until you propose that the women should have to put in a quarter to get a funnel that the men don't need :)