A big part of what Chipworks does (as a company) is reverse engineering silicon from die shots and x-rays and such. They're not just going to hand this kind of information out on a platter - they were commissioned to do a cursory glance for this puff piece.

But it also doesn't take a genius to guess at what the various hardware modules do just given what the iPhone can do.

This is where Apple really adds value and why they have their own silicon design teams.

Some of the blocks:

-- M7 motion chip

-- Image processing chip to support camera

-- (I suspect) audio processing chip to do compression and feature extraction for SIRI

-- (suspect) video codec (though this may be done by GPU)

-- Secure Enclave -- CPU with secure data, random number generator, Apple Pay support, Fingerprint Sensor support

-- (I suspect) memory management units and io co-processors and the like that are too mundane to get much public mention

Various units. You can get an idea looking at Snapdragon graph: http://www.gadgetfreak.gr/wp-content/uploads/2014/04/snapdra...