Robot vacuums have now been around long enough that you might watch one bump around a living room and think, why isn't there a robot that could mow my lawn? Turns out, it's not for lack of trying.
For more than a decade, iRobot, the company behind the Roomba vacuumbot, has been working - and working - on robotic lawn mowers.
Now it finally has something to show for the effort, though it's come at a cost.