Thanks for sharing your story; and it does seem similar to what PG experienced:

http://www.paulgraham.com/yahoo.html

Seems that the aphorism: "don't explain concepts to someone whose salary depends on his not understanding them" applies.

With regards to this particular topic, then, I would concur with the popular opinion that Microsoft's Windows and Office cash cows are too valuable to be offered as sacrificial lambs at the altar of cloud/mobile computing.