What will they come up with next?

Personally, I think its pointless for on a walk. Especially if you live where a walk is the only way your dog gets exercise (like here). The only reason I would see for someone to use it would be if their pet was disabled and couldn't walk without it hurting.

But then again, when taking a cat to the vet, they usually (at least mine do) get scared and its not wise to try to hold them. A regular pet taxi does the job, though.

Whoever invented this must be getting some money, though, so... congradulations for them!