I would love a roomba lawn mower, but with as often as my roomba runs over my feet while it's going through its cycle, it would need some serious sensors. And when I'm mowing, I inevitably have to pick up some sticks that fell from my tree, or sometimes trash that people threw onto my lawn as they drove by. It's a harder space than the living room, you can't control the outdoors quite as much.
I think a slow-motion lawn mower could work. More like a turtle that crawls around cropping the grass. Always there; maybe solar powered; keeps creeping around and gently munching the tops off the taller stems.
