Nice wrap up on SAI, from a Quora post about how apple uses its massive cash resources:
When new component technologies (touchscreens, chips, LED displays) first come out, they are very expensive to produce, and building a factory that can produce them in mass quantities is even more expensive. Oftentimes, the upfront capital expenditure can be so huge and the margins are small enough (and shrink over time as the component is rapidly commoditized) that the companies who would build these factories cannot raise sufficient investment capital to cover the costs.
Apple is not just crushing its rivals through superiority in design, Steve Jobs's deep experience in hardware mass production (early Apple, NeXT) has been brought to bear in creating an unrivaled exclusive supply chain of advanced technology literally years ahead of anyone else on the planet. If it feels like new Apple products appear futuristic, it is because Apple really is sending back technology from the future.
Reminds me of the Clarke's Third Law:
Any sufficiently advanced technology is indistinguishable from magic. -[Wikipedia]