Years ago I read a book called The 12 Hour MBA Program. I have never met an MBA who knew something important about business that wasn't in that book.
I read a book once about the alphabet. I too have yet to meet someone that speaks English that knew something important that didn't use the pieces found in that book.
Microsoft has made keyboards, mice, and other products for years, in addition to printing and distributing their software since the beginning. Physical products aren't new to MS.
You're right! That is why they were so successful with the Kin. No wait... Oh there is the Zune... crap. Surface RT?