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Unlikely. Windows is a huge cash cow for Microsoft, and unlike Apple, they are not really a hardware company (with the exception of Surface Tablets and XBox). Apple has already gotten the user to pay a premium price for hardware, and this makes that hardware even more attractive, so it makes sense for Apple.
Microsoft has had problems adjusting to the modern computing world, clinging to its Windows OS desktop empire and blowing mobile (up to now). But as Microsoft's latest quarterly earnings report shows, Windows still generates a healthy percentage of the company's overall revenue -- $4.3 billion out of a total $18.5 billion. Not sure how much of that is from upgrades. I don't see it happening (at least until Ballmer is out the door).