Or maybe you'd use the same gadget to answer the doorbell and talk to a visitor, even if you're half a world away.

CNN: Doug Gross,

"That's when you see people, when they go for a walk, they're being pulled by their dog, or when they open the door, just to answer the doorbell, the dog gets to the door first, " he explained.

CNN: 'Dog Whisperer' Cesar Millan on adopting the right dog