Federico Viticci:

The iOS-ification of OS X is, at this point, inevitable, and anyone who doesn’t see it, or tries to neglect, is either software-blind or has some kind of interest in that way of thinking.

You’ve got: (a) apps that started as iPhone apps which then became iPad apps which then also became Mac apps (Reeder being the paramount example); and (b) Apple itself making more and more of the features and designs in OS X feel and look like those in iOS.

And it’s only at the beginning…

The iOS-ification Of Apple’s Ecosystem