Microsoft Windows 1 and 2 did nothing to disrupt the market an any way. Traction for Windows didn't occur until Windows 3 was introduced in 1990. Apple had already defined the windowing product category 7 years earlier and being the #2 computer manufacturer in the early 90's did disrupt the computing market. The structure of the market was already altered, not in iPad or iPhone sales numbers ways, when Microsoft Windows work started paying off for them, and its users.
Sorry, but you are missing my point. I understand that you know the history and so do I, but to understand the market and it's dynamics it's necessary to look wider.
The MS windows product follows a textbook product life cycle curve. The start of that curve is slow adoption by early adopters, followed by incremental innovations in the platform to start an accelerating growth phase. It is indeed windows 1 that started the market disruption, while windows 3 started the growth phase. MS is now struggling to find a way to get its product out of the maturity part of this cycle, which is very difficult.
Sorry if this sounds theoretic, but understanding product life cycles is incredibly helpful in determining product and business strategy.