Auto Mow Lawn

Every suburban house has a lawn. Once, lawns were a symbol of luxury, as it meant that you were wealthy enough to employ a gardener for no good reason. But since then, lawns are now maintained by homeowners because they're fun to walk on and everyone else has one.

Using the same logic as vacuuming robots, let's have lawnmowing robots that wander the yard, snipping the grass as they go.