My girlfriend/SO's grandfather died last night, running on a treadmill when his heart gave out.
He wasn't signed up for cryonics, of course. She tried to convince him, and I tried myself a little the one time I met her grandparents.
"This didn't have to happen. Fucking religion."
That's what my girlfriend said.
I asked her if I could share that with you, and she said yes.
Just so that we're clear that all the wonderful emotional benefits of self-delusion come with a price, and the price isn't just to you.
So I can envision future persons wanting to meet some people from the past for historical reasons as you say. But I'm not sure we'd bring back thousands of Homo Habilis if we had the chance. One or two might be interesting- but what would we do with thousands?
"Future persons" are not a monolithic agent; all it takes is one agent able and willing to revive you, maybe the cryonics organization. And as Mulciber said, compassion is a likely motivation as well.