Blah blah blah ..
Meanwhile back in the real world the work which MUST be done on a desktop (as opposed to work which could be done on a desktop but which is with relative ease handled on a machine with a different form factor) has shrivelled to a much greater degree than PC sales. Including in the definition of "PC" that few square inches we hold in one hand (stop sniggering at the back) and which is equivalent to the power of a PC very recently total sales have gone up exponentially and will increase.
Does anyone care about these Olde Worlde statistics apart from the desktop-building dinosaurs who have failed to move on?