Does anyone see the writing on the wall?
Apple is about ready to start using its A chip (ARM-based) with something more than a tablet. Things like an iPad Pro aka very thin MacBook Air, which may or may not be the same device, no longer need to depend on Intel for the chips. Apple is getting pretty close to be able to put their own chip in a device that is a pro-sumer device - light professional use device - that can do more than the iPad is allowed to do.
I'm fully expecting such a device to emerge soon (perhaps within a year), and I believe there is going to be a "laptop" and a "tablet" GUI on this device. How will Apple implement this is anyone's guess. Apple execs have repeatedly denied a rumor that Apple is working on a hybrid OS that will integrate OS X with iOS. However, who is to say that Apple cannot implement this dual-OS paradigm in one device using virtual machines, something similar to the way this is done in Linux KVM? Both OSes may be able to get direct access to the kernel and use the same database for common applications, such as Mail, Safari, Notes, Contacts, Reminders, iMessage, FaceTime, Pages, Numbers, Keynote, Photos, etc. This would not be a "hybrid" OS per se. Instead, this would be two OSes running on the same hardware and getting a direct access to the same kernel while keeping all of the data in the same databases.
I would absolutely buy such a device. As an engineer, I need to have a device that is more capable than iPad, but yet can function in the tablet mode when I am not doing professional work on it.
And no, I will not just go a buy a Surface. Surface is an example on how not to integrate a Desktop OS with a mobile OS. Having two versions of a mail client, a web browser, etc. is not the kind of integration I'm looking for.