Don't see it. I see them as additions, certainly, but some sort of move towards the more portable devices, x-pad/tablet type included? Nah.
Greed will stop it. Apple, and not to single them out, most other manufacturers of such products hold onto locking down or out features and functions because they might lose out a buck on a transaction or the like. That tunnel vision has been Apple's handicap since inception, only by [IMO] it's combo of successfully targeted avertising, and uniquely ingenious easy interfacing have they conquered in recent years.