An alternative theory is this- since they know there will be tons of demand for a RMBP13, almost no matter the specs, they are better off selling one with a bit lower specs (and higher profit margin) to the early adopters who will buy any 13" that is an upgrade over the MBA, and then increase specs in the second generation.
You might just be spot on with that one.
Though it could be a lame upgrade still.
Some people reported that early Haswell GPU tests did not perform as promised.
No idea if that is true but I bet Apple knows already.
So if Apple with the next upgrade does not intend to upgrage with a dedicated GPU but Haswell only and this performs lackluster they need to provide other candy, like a 16GB RAM option, quadcore CPU and more storage.
Which is why they removed those options now.
But those 3 might be all we get in the next upgrade...
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I bet you they're gonna pull an "Air" move in 2014 and make it right with everything it should have came with for $1199.
With all the ultrabooks copying the Air, I bet Apple will one-up them with the next Air model.
It'll be noticeably thinner and lighter than current Air models yet again.
Carbon fiber?
iPhone 5 like super-thin screen?
iPad mini like super thin battery?
ARM based CPU with Intel compatibility mode?