>a future where true general purpose computing starts to disappear

I think just the opposite happened. All we had were general purpose computers, then we added "easy to use" computers in the form of smartphones and tablets. It just allowed a lot more people to take advantage of computers, it did not remove access to general purpose computers for the rest of us. Personally, I love the idea of a bifurcated world where the less technically savvy use devices that are far more restricted and secure. I really like that my parents can get a device, like an iPad, that does everything they need from a computer (email, facebook, light web browsing) without having to worry about malware.