This. At least for the general public. The whole idea of a "computer" is simply a result of how primitive they are. That the software that controls them requires the user to understand concepts such as operating system and application, networking and device drivers. People don't really ever want to know they are "running a word processor" or "launching a web browser". They want to accomplish specific things, like writing a note (or video chatting) with a friend, looking something up or watching a movie.
The technical crowd loves to complain about Apple's walled garden, but this is exactly the genius of Apple. They get that. They get that they have to evolve the thing called a computer into a thing that people don't ever have to fiddle with. That simply exists to provide useful services for their life. The other computer manufacturers understand that to a smaller degree and then wonder why their tablets aren't as successful.
The personal computer, as technical people know it, is going away. It's growing up into what the vast majority of people really want. And thank God. I'm glad I don't have to stand in front of my car turning a crank to get it running.
But all is not lost for technical people. There will always be ways to have your own device. The free software and maker movements will ensure that. In some ways things are better today than ever. In the 1980s (some consider the heyday of the open personal computer) we had the 8-bit IBM PC. Today we have a gamut of programmable devices ranging from Arduinos to $35 linux computers to set top boxes to multi-core, multi-cpu computers more powerful that super computers of the last century. All totally accessible.