Astro is only about the size of a puppy. But it is capable of more than a large dog. It can bring you a bottle of water when you are thirsty and guard your home even when you are away. Above all, Astro can do what man’s best friend cannot. It can chat on video call and play your favorite music. Equipped with its binocular vision and three wheels, the Astro can follow you, switch on the television, and display a visitor’s face on its 10-in.