I don't expect to see the rMB ever get more ports. A also don't think the MB Air will ever get a retina display. If it did, it would kill battery life and drive the price up. The MBA is a perfect entry level laptop that is affordable.
You don't believe in technological progress? A Retina display should be standard on every MacBook at this point. Battery life should be alright. As for the price going up, well maybe Apple should cut us some slack and keep prices "reasonable". Just saying...
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What was it you were expecting? Apple has never made a major redesign to a notebook after one year. They have always been spec updates. This has the fastest RAM that Skylake-M supports, adds a faster SSD controller, and a typical Intel processor boost. Apple MIGHT have been able to squeeze a Thunderbolt 3 controller in there (at the cost of some of the boost in battery life), but there never was going to be a second USB port in this year's model (and probably never will be, as Apple is more likely to add wireless charging than a second USB port at some point in the future).
I do expect an extra USB-C port on a larger 14" rMB. If not, Apple's just being cruel. Actually, Apple is being cruel allowing a 480p webcam to remain. That's ridiculous.