Oh, I have seen those. I don't care for them, but to each their own. I find them just a bit creepy. I'm all for having pictures of your deceased loved ones. I just find it odd when they are intermingled with people.
This is a new concept for me! I don't think I, personally, would want one. But I wouldn't tell someone else not to have one. It does sound like a unique way to keep a passed family member close to you.