iRobot (makers of Roomba) have announced one. I didn't realize Honda already had one. The difference is Honda requires a wire around your yard to guide it. iRobot's lawnmower just requires you to drive in a couple of beacons into the yard and then manually drive it around the edges of the yard once showing it the boundaries and places to avoid.
I guess in the future people won't know the satisfaction of mowing a lawn!
I no longer have one but growing up I loved spending time curating the lawn. Now when I go visit my parents I ask them NOT to mow anything so I can do it all. I find it therapeutic.