Blow up dolls for grandpa, charming.
I once met one, and it is extremely depressing. He was even rich, but had no idea how to get his life in order, and nobody cared about him. A helpful AI might tell him to go to alcohol therapy, hire people to clean up his house, explain bureacracy... That would help a lot.
It is easy to be lonely, I have talked to several charismatic and very cool people who complained about how hard it is to make friends in a new city. This combined with other negative factors can cause people to fall in a hole. (Of course, people who are delusional about their AI girlfriends like in /r/replika are also sad.)