This is possibly the worst idea I've ever heard of. If you can't walk your dog then why do you have a dog... and why does the dog have you? Both you and your dog need those moment for bonding. I actually answered the survey but it's not going to be the encouragement you hoped for. There is no technology currently that even comes close to being reliable enough that I would let my dog out of the house leashed to one. No way. No way!
If you want to develop a useful robot (dog or non dog related) then try focusing on one that can do light house keeping and/or surveillance tasks (possibly related to the dog) when you are not home. I could see a role for a robot in the house that kept an eye on the dog but beyond that my Roomba is more useful to my dog than a walking robot would be. Moreover, a dog will know it is not human and while I'm pretty sure you could train a dog to tolerate the presence of such a machine, they're not going to warm up to it.
If you want to develop a useful robot (dog or non dog related) then try focusing on one that can do light house keeping and/or surveillance tasks (possibly related to the dog) when you are not home. I could see a role for a robot in the house that kept an eye on the dog but beyond that my Roomba is more useful to my dog than a walking robot would be. Moreover, a dog will know it is not human and while I'm pretty sure you could train a dog to tolerate the presence of such a machine, they're not going to warm up to it.