>> "you can't even do standard cloud stuff like share photos"
You can, shared photo streams which came with iOS 6 I think. You can also create shared photo journals in iPhoto (on iOS) which I presume work through iCloud.
Thanks for letting me know. I tried to do a mobileme style photo album about six months ago and was amazed that they had removed such a useful feature. Glad to hear it's back, even if it's in a slightly different form.