I'm beginning to be more and more worried that the new 12" MBA we are hoping for will be some kind of iOS device like an iPad with an attached keyboard.
(Which would be TOTALLY useless for me)
I don't think Apple will do that.
I think Apple will eventually merge iOS and OS X, but we're not there yet.
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Apple should make the MacBook Air have retina display and still make it thinner! That would be a must buy.
That's what I think will happen. Apple may use IGZO or even LTPS to make displays more energy-efficient despite the high resolution. In addition, Broadwell is supposed to consume 30% less battery than Haswell, if Intel is to be believed. If that all holds true, then the MacBook Air could have a smaller battery, a thinner body and still a battery life similar to the current model.
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In your estimation, then, those of us who use Thunderbolt displays and SSDs aren't worthy of consideration ... right?
I didn't mean that.
What I meant was that a particular device will have a USB or a Thunderbolt connector. A Thunderbolt display cannot be attached to a USB port, and a USB printer cannot be attached to a Thunderbolt port. Therefore, it's useless to compare them both from a consumer's perspective. You should get what you use more, and most devices are USB-compatible, and not Thunderbolt.
Said that, Apple laptops come with both USB and Thunderbolt, so you don't have to choose. Just get the device you want and plug it into the laptop.
This comparison between Thunderbolt and USB seems useless for me in this particular topic. If I were a company interested in making external drives or displays then I would check the comparison between Thunderbolt and USB specifications, and also the availability of such ports in the laptops in general.
But, as a consumer, all I can do is buy a device that is Thunderbolt or USB. I cannot choose an Apple external display that will work plugged to a USB port because that simply doesn't exist. Why the comparison then?
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Have you found the need to adjust to the lower default resolution of the 13" rMBP, or are you running it to approximate the higher res of the 13" MBA?
I ask because I'm considering moving from my 11" MBA to the same machine you purchased
What exactly do you mean?
I do have a 15" rMBP, and the retina settings equal to a 2880x1800 resolution with a 1440x900 aspect ratio. However, I use the 1920x1200 aspect ratio, which is the maximum allowed under OS X without tweaks (the resolution is still 2880x1800: text is incredibly sharp, but the real estate in the screen is larger, as the OS renders images at 3840x2400 to display them on the 2800x1800 screen).
A 13" rMBP should run under the following aspect ratios: 1280x800 (retina), 1440x900 and 1680x1050 (both scaled). So, the 13" rMBP should run with the very same aspect ratio of the 13" MBA, but with much better sharpness (as the resolution will be 2560x1600, despite the 1440x900 aspect ratio).