There are so much of useless inventions, and this seems like a favourite for top positions. But, as there are many cat-lovers on the planet, this may seem as a great idea to get rid of the cat poo 🙂
So, get your cats into robot (what if robot goes crazy and start to roll the cat! 😉
On this web-site there is the demonstration of this litter-robot:
Litter robot web site