the difference with this mower is it uses wireless stakes to define the cutting area. competing robo-mowers require you to bury wires in the ground. The biggest benefit I can see is ease of making changes... Decide to do some planting, put out some yard decor or otherwise change the layout? Re-position your stakes. No digging up the yard.
The biggest problems I've seen with the robo-mower idea are related to cost.
1. Existing robo-mowers (at least as sold by places like Home Depot) are expensive. Like $2000-$3000 USD expensive.
2. Letting them run while you're away (which would be one of the attractions and selling points) means your very expensive mower is out there unattended for anyone to grab. Never mind the potential liability concerns. My back yard is fenced, but most people in the US don't fence a front yard.
3. For the price of a robo-mower, you could purchase a very nice riding mower, with assorted attachments. This would dramatically reduce the amount of time spent mowing, and give you additional uses like hauling, leaf cleanup, tilling and so on. Robo-mower, it mows. That's all.
I suppose if I had a large rural property, where the risk of theft or cutting off the toes of a curious person was minimized, I could see how a robo-mower might be ok. For the typical suburbanite, what we REALLY want is a robo-lawn-care-service that will mow, edge, trim hedges, fertilize, do pest control. Like that other favorite of Popular Mechanics, the flying car, I'm sure it's just around the corner...