I've been thinking of what a more efficient and effective dishwasher would look like, and I think it would be something like: 1) you put dishes in it continuously and it cleans continuously, no start/stop cycle, such that when one is done eating, one puts the dirty dish directly into an opening that then slowly swallows it up (leaving dishes in the sink to dry out is what makes them so hard to clean). 2) a more effective filtering system that empties out automatically at a more frequent rate, so you can put very dirty dishes in and it can handle them without recycling dirty water and 3) ideally, robotic graspers that can hold each dish, conceptualize the shape, and actually scrub the dish.

Efficiency with power and water and a low level of noise are what I looked for when buying a dishwasher. It's hard to get these with the above requirements.

That has sooooo many more moving parts than a traditional dishwasher with one moving part powered by water pressure. And traditional dishwashers are unreliable enough as it is.