https://www.husqvarna.com/au/products/robotic-lawn-mowers/
But also pricey. A couple of K for one.
Lawncare involves a lot of well-defined tasks on a well-defined surface. A lawnmower bot could also have a hopper to dispense fertilizer and seed. In a more extreme, force-intensive form, it could even dispense topsoil or aerate.
In winter? Salt my driveway and sidewalk (assuming ploughing is out-of-scope for this particular robot).
I don't know if this is because lawns tend to be smaller in europe or some weird cultural pride thing, but they totally exist and are identically capable to roombas.
Carpet cleaning should also be pretty comparable - there are many sweeping ones - though the robot would necessarily be larger. I suspect the market isn't there
That tolerance goes away when it's a high-powered 1-ton machine with the potential to kill dozens with one error, one that has to work flawlessly in a very quirky environment tuned for human perceptions and expert human users. There is no piece of software (or software-driven hardware) I've used where I'd say: "Yes, this is at a level where I'd trust it unsupervised when lives are at stake."
I think anybody expecting robot cars in the next few years will be wildly disappointed.
Stuff like these, https://www.youtube.com/watch?v=8LlaaV2iMb0 scoots around and keeps the lawn decent, goes back to its charging station when needed.