Arisen from the dead.

"Be Right Back" is a commentary on the ways technology can affect the grieving process. But it also shows that their is no such thing as sacred space on the internet and that technology is as addictive as any drug in production. Martha had a near panic attack when she dropped her phone after the ultrasound. She shut her own sister out to talk to an AI that was supposed to represent Ash. She became addicted to the same thing that she would be abandoned by Ash for. The problem that Martha soon realized is that when she "brought Ash from the dead", he was not Ash. He was bits and pieces, but not the real thin. He had no unique personality, could not act beyond his parameters, and did not really think for himself, just on what Ash uploaded. In some form, he was a zombie. He was not what Ash was. A shell of his former self. Yet, Martha was so obsessed with this thing that reminded her of who she actually loved, she could break away from it. So she kept it, just to keep the addiction alive. Much like addicts cannot go away because they are too weak without it, Martha couldn't handle being without Ash, and pictures and voice recordings were not enough. She needed something physical to hold and see. So she keep him in the attic. Symbolic considering that Ash's mother kept the pictures of his dead father in the attic. She only wanted to see him when she wanted to. He just stared at the walls all day, because that was his order. He wasn't a human, he was a slave. This was a perfect example of how robots are not always the best alternative to solving problems. It can be nothing more than what it was designed to do. It has no consciousness. It has no free will. It was about to jump off a cliff because he was instructed to.  Human consciousness is a beautiful thing. It drives the world forward. Without it, we could not possibly have progressed to the point of arguing about the practicality of robots. Robots wouldn't exist with human freedom. So for this purpose, just let the grieving process take place and don't try to bring them from  the dead.