As you know from the other threads, OP, I'm in a similar situation. Am typing this on my 2011 13.3" Air after using the RMBP exclusively for about a week. The decision would be easy if this MBA had an IPS display -- I find myself missing the resolution of the RMBP much less than the contrast. The Air has fine resolution but everything seems to ridiculously washed out in comparison to the RMBP. Makes me wonder why Apple isn't offering an IPS panel for the Air. It seems like such a no-brainer. Very odd.
I think if I could get a guarantee that I'd get a Samsung display and SSD on a new 512/8/2.0 Air, I'd swap the RMBP for it. Given that I might have to go through several returns on the new Air to secure that combination, I'm holding off...just don't have the time to play lottery anymore like I did with the iPad 3. On the other hand I will have to return the RMBP soon as it has four dead pixels, so I might just give the Air a try then.
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Btw, I'm surprised people are focusing so much on footprint and weight of the Air, when I find the tapered edge design at least as important in giving it an edge over all the MBPs. You mention the weight in the context of using it on your lap a lot, but don't you notice that it also doesn't cut your wrists like the Pro does?
You made good points. Particularly about the sharp edges. I cut my inner forearm a few years back enough that it drew blood … no doubt my fault how it happened, I jumped up and ran my inner forearm hard across the edge, but had the edge not been sharp nothing would of happened. I made a post about it here, got slammed, was told my typing style was all wrong blah, blah. I have done my part at least, since the first MBP's came out with sharp edges I've emailed feedback@Apple numerous times. There's talk about it on the Apple forums for years. You can see how it's turned out, rMBP edges are still sharp making my Air more comfortable for typing on my lap or non optimal position. …. Amazing Apple can't round that edge, takes a second and costs nothing to do.
As far as displays go I'm lucky with the MBA's, no major problems. I will say in dim light or dusk the screen does strain my eyes more than the MBP's I've had. Making sure I'm in good lighting solved the problem. I used to check and see whether the display or HD was Samsung or LG, but I gave up on that as I don't want to urk my ocd tendencies
When it comes to the rMBP thankfully price isn't a factor, and sure I'd like to own cutting edge, future tech, the display is for sure stunning. But being an Air owner I'm spoiled by their weight and footprint, now they have 8GB ram, 512SSD's it's what most Air owners have been dreaming of.
If I keep the rMBP then I'll also have an 11" Air for sure, or maybe a 13" because now when I switch back to the 11" the text seems super small compared to the rMBP and it takes my eyes a few minutes to adjust. The rMBP screen spoils be, but since I like to type 'anywhere' and on the go I'm sure the Air will get more attention than the rMBP, that makes me question whether I should keep it or not. Maybe I should just buy a 13" MBA ultimate, work from one machine and be done with it.
What's holding me back is if I do that I loose major in screen real estate and 'eye comfort' and that it makes me want to just keep the rMBP make it my main machine and get used to the size and weight.
The 13" MBA 2.0./8/512 is more practical and sensible plus there's the pleasure of working from one main machine rather than two. The downside is loosing the beautiful larger screen of the the rMBP and I'll miss the 11" for sure. So by going with the 13" MBA I miss out on nice future tech laptop powerful and with retina display also the very cool and alluring 11" MBA that I enjoy so much.
My take on it is, it's either the best of both worlds - 15 and 11" or being maybe more rational and compromise a little and buy the 13" MBA that's good at everything, but not excellent in either display or super small for mobility.