How can we make bio-toilets and waterless urinals more prevalent and widespread?

Bio-toilets and waterless urinals surely appear the way to go; their contribution to water conservation and sustainability can be quite significant. But, these are still not used on a large scale. What are the avenues, solutions and technologies through which bio-toilets and waterless urinals are commercialized and implemented on a much larger scale globally?

How will it have a positive impact?

Who will it have a positive impact on?