[jacksondeane]

I could see some kind of Parental Controls making it into iOS at some point, and less so "Guest Mode". As for the other 2, I wouldn't bet on it, ever.

[johnnyo]

I could see Parental controls as well, but you can pretty much do this already, on a per-device level.

I think Apple's goal is to get you to buy your kid and iPad and lock it down, not let them borrow yours. I don't see iPads every having separate user accounts like a traditional PC has.