Windows ' continued dominance is not due to superior marketing, it is due to Microsoft's monopolistic position in the industry .... specifically, it's leverage over the OEM community.
MS was convicted under the Sherman Anti-Trust Act in 2001. But the court "remedies" applied did not affect their monopoly. Thus they enjoy a government-condoned monopoly today. As long as this situation continues they will dominate the desktop/laptop/notebook markets.
Only when a new market opens up can they be displaced. And this is exactly what has happened in the tablet and smartphone spaces.
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