You used Apple Sales as the basis of your argument when all it actually shows is that Apple Desktops are in decline and Apple currently sell more Mobile Devices than they do stationary devices.
Surely that only means that Apple make "More Desirable" mobile products than they make stationery products. They have a small proportion of the Computer Market and that seems to be shrinking by Apples Sales Figures not improving/increasing unless you insist that a Cell Phone is a Computer which can do everything a Computer can. Also the movement to 7 inch screens at the expense of Large Screen TV type formats seems just as nonsensical with the current sales of TV's it's the bigger the better they are not shrinking to the 7 inch Format but expanding to 50 + Inches as the desired format.
What I think would be a more accurate depiction of Apples Sales Figures is that they have positioned themselves out of Computers into the Fashionable Mobile Market where they have a High Turnover in damaged devices requiring often replacement of the broken devices polluting the Land Fill with Toxic Chemicals and worse still wasting limited resources on what are effectively Throw Away Devices with a increasingly short shelf life.
If anything it just proves that Apple is in the process of moving out of Computers all together. Not that Slates or Phones are replacing computers.
Keep Up with TechRepublic