Horace Dediu:

But more importantly the iPad and the Mac both outgrew the PC market. Taken as OS X vs. Windows, the growth rates were 27.7% vs. 2.5%. If iOS is included along OS X, Apple grew its “computer” shipments at a rate of 99%.

Apple has done so much right with its product line over the last decade. Companies think they can just come along and loosely copy an Apple design and ride their coattails to success, but there’s a lot more to it than that.