My mom's mom lived until I was in my late teens. We went to visit her a lot.
I don't need any damn AI to talk to any of them.
What you ‘need’ may be very different from what somebody else may ‘want’.
If you showed a photo of your grandmother to a child today, the child would know that the photo was not a real person. If I played tape recordings of my grandmother to a child today, no child would believe that my dead Granny was in the room.
When kids watch movies these days, they know that ‘Gollum’ isn’t real, and that the flying creeatures in ‘Avatar’ are just cinematic visual effects. They’re going to understand the same about this. Unless a kid is really subintelligent, they pick this stuff up by a kind of osmosis, and always have.
This is just a very advanced form of Disney ‘animatronics’, to me. I don’t think many find the ‘Hall of Presidents’ creepy.