I think that there are people who don't like to deal with washing dishes even through they have a dishwasher. I don't think the task is trival in a sense that people wouldn't be willing to invest money into a device that fixes the issue.

Apart from that a redesigned device that builds on smart sensors and nanotech filters could also operate with a lot less water.

GE's design of a kitchen of the future with a smart sink that can automatically wash dishes is also interesting.

If I look into my kitchen the most recent invention is the microwave.

A few health conscious people I know have nanotech water filters for the water in their sink but apart from that the kitchen is mostly didn't change.

I think that it would be possible to build something better by investing the kind of money that went into Tesla and SpaceX.

I would expect that in a decade we see a lot more sensors in the average kitchen then today.

The orbital-systems shower is a good example how nanotech plus sensors can produce a shower that performs better than the old shower.