Robo Plow

With as much as I hate shoveling snow and as many posts I've done with robo this or that I'm surprised I haven't hit on this yet.  It would be great if there was a robot on wheels (preferably the robot that mows my lawn during the summer) that would shovel the front walk when it snowed.  It would be especially helpful in retail business situations where a good week snow storms could cost a lot and you have to have your parking lot clear by a certain hour.