Maybe it's just me but I'd rather mow grass that watch TV. The robot mowers look like they just run around at random rather than cutting back and forth.
Years ago I remember seeing the equivalent "redneck" system simply by using a self propelled mower tied with a rope to a driven stake in center of yard, spirally cutting as it wound around stake.
That's not a very tough decision. I would rather do most anything than watch commercials on TV, with the occasional break for the show I'm allegedly watching.