Kinda like desktops are dead theory right? I think all form factors will do equally well. There's that overly focusing on one metric theory happening true again.
Not really, I don't think desktops are going anywhere any time soon. Even as phones, tablets, etc. become more powerful, the desktop will always be a few orders of magnitude ahead and more useful for professional work.
However, in a lot of markets, there was never a big PC explosion. It was too expensive or the country lacked the infrastructure necessary to support the PC revolution when it was happening in the rest of the world. Cellphones are used for communication and social networking in lieu of traditional computers. As the future gravitates more towards smart phones and tablets being more than capable of dealing with most needs, it's possible that these areas may largely eschew the PC in favor of these new devices.
It's a little like missing out on the first few seasons of a TV show and never bothering to watch the later seasons no matter how good they are.