First things first, take a look at the video embedded below, a Fox News interview with Bill Gates. Jump to about 11:28 in, where Bill is asked about his “famously tempestuous” relationship with Steve Jobs and the new iPhone.

With that in mind, this is John Gruber, from the linked Daring Fireball post:

I say this with no snark intended: who would have guessed 10 years ago that Bill Gates would be using a personal computing device running a non-Microsoft OS? Or really, an OS that didn’t have “Windows” in the name?

And:

While I’m at it, it occurs to me that Apple is the only company left where all its employees are using only systems made by their own company.

Read the whole post, including the update. Fascinating.