Arguable. You can move any photo from the 1,000 picture photostream into an album on your iPad or iPhone. Then the albums are all backed up to the iCloud's separate backup service.
It's interesting, but seems like conflating a desire for archive with a desire for PC-level control. They seem like parallel but distinct issues to me.
Even FB stores those photos in perpetuity, doesn't it? I really don't know, I'm not on FB.
Is the idea of permanence or permanent record fading with the PC?