Maybe Apple is in the process of a major PIVOT and the new campus is a very real physical manifestation of that process.
This guy is great, makes a compelling case for ARM in macs, sadly no updates since last year and the user posts here too -
http://www.applenews.zone
If there was an arm switch and considering how thermally efficient they are, why not pack 4,6,8,10,12,16 into a much larger laptop chassis but one that is thinner where a fan is not an issue, if you need one. These chips already fit into a tiny space, a laptop chassis is like a football stadium compared to the space in an iPhone. Now that intel are in the mix for fabbing ARM chips thing got one step closer to a wider deployment of ARM across the APPLE ecosystem.
They decide to innovate a complimentary array of chips if switching to ARM, you might see something more like the custom chips legacy pioneered on such platforms as the Amgia, (AA & AAA) chipsets but in an contemporary tech world so much bigger and wider with a company that has a lot of money.
Imagine SSD is also part CPU. What I am trying to say is there may be a whole new approached informed by the innovation from the tiny iDevices, rolling back to the desktop/laptop formats liberating the internal layouts from the limitations of spludging together multiple third party tech to produce a final product. Closer to Jobs vision of full control of the silicon as others have mentioned here.
If this happened, APPLE would be in their own league. It would be reminiscent as I said of the early days, where some platforms now gone were vastly superior to the era of PC's proliferation which gave Windows the leg up and intro to a wider market when WANG was knocking out the units cheap. Where are they now?
I think so many in the West get confused by Cycles, which are natural, yes things repeat, it is not to be assumed to be a sign of going backwards. Moments now may resemble moments to the past but you are further along in the story. We have a very linear demand on life in the west. Makes people a bit cranky in threads like this but there are valid concerns about the snail pace of deployment of pro tech in the pro lines of MacBooks.