While I admire the goal, this solution makes me sad. If a dog needs more exercise, then it should be exercised more often. A responsible pet owner should know their schedule and lifestyle, and choose a dog whose exercise needs match that.

I find it unfortunate that some pet owners would absolve their responsibility towards their pet with a machine. There is great value to the relationship between a pet and its owner during both feeding and training. While it's neat that we live in an age where technology allows us such "conveniences", I think there is a point where you must ask yourself what is the point of life if you don't actually do anything meaningful? Bonding with a dog, if you have not experienced it, is a lot more meaningful than just making sure they don't shit on your rug while you're gone.