They already do.

I've lived without a dishwasher for a few years and it was nightmare.

I've had a robot vacuum for less than a year and I hate it without it now and want it back.

And the washing machine is a game changer.

These three are a backbone of home automation.

Another HUGE thing is the multipot, not sure what's it's called in English. It can make perfect sushi rice 10 times out of 10. It prepares really nice pilav for you. It can make the soup. It automates a lot of food processing stuff.

So basically the only big thing for me that robots can't do yet is dusting, washing the bathrooms (I've seen the big ones that do but they're the size of a fridge) and preparing food as in cleaning and chopping. But you can do that with multiple small kitchen appliances.

Oh and another one is the window washing robot. I don't have one but I've seen a lot of people say these are great.