As always, a patent is NOT about things you ARE going to do, it is about staking a claim on something you thought up (maybe while doing something else) so that you can now make other people pay you if they want to do it.
In other words, Apple did this for the Mac Pro, realized it could potentially be used in other situations, and so filed a patent. They probably do not have even the slightest intention of putting it into one of their own small devices. But, if you come up with something new that can be patented, you patent it, especially if you are a large corporation that does many different things. Having a deep patent portfolio is also a defensive weapon in the certain scenario where you inadvertently do something that infringes someone else's patent. Maybe you can negotiate, since the opponent may very well be treading on your own patents, too.
The most we can read out of this patent is something we already knew: Apple made cheese-grater Mac Pros, and the way they built the case was a new technique. That's it. That's all this patent can tell us. It may mean more, but there's no good reason to think it means more.
In other words, Apple did this for the Mac Pro, realized it could potentially be used in other situations, and so filed a patent. They probably do not have even the slightest intention of putting it into one of their own small devices. But, if you come up with something new that can be patented, you patent it, especially if you are a large corporation that does many different things. Having a deep patent portfolio is also a defensive weapon in the certain scenario where you inadvertently do something that infringes someone else's patent. Maybe you can negotiate, since the opponent may very well be treading on your own patents, too.
The most we can read out of this patent is something we already knew: Apple made cheese-grater Mac Pros, and the way they built the case was a new technique. That's it. That's all this patent can tell us. It may mean more, but there's no good reason to think it means more.