Current products which point to the future include the use of fuzzy logic sensors to prevent continual flushing. I've checked these things personally. The user must appear in front of the unit for an extended period of time before it will flush again. On the horizon are pressure-assisted water closets in which water and air are mixed for the most efficient flush. Ballanco has seen these in operation.
Low maintenance is also a large part of current and future designs.
Electronics will play a large role, and waterless products will be entering the market more and more. One company, Waterless Company in Del Mar, Calif., has already put a few waterless urinals on the market. Their No-Flush urinals resemble conventional fixtures and can be installed where standard urinals are located. However, there is no need for flush water supply lines, handles or sensors. The standard trap drain is replaced by a disposable trap containing a layer of immiscible liquid which is lighter than urine and therefore will float on top.