I can follow your thoughts for sure, but as nice the 27" Apple display is, it has one thing that is a no no for me, which is the glas covered display.
Yes, the glossy screen is not a good thing. Fortunately, since 13" Air they started using anti-glare coating on the displays, so hopefully this will be introduced to their entire product line, because producing a glossy screen without coating is just ridiculous. I do prefer a coated glossy to matte, though, because matte reduces contrast too much for my taste.
If you do serious photo editing get the new MBP 15" instead of the MB air There is no comparison in performance.
I might, because I need to replace my desktop this year and replacing both with a single computer does have a certain appeal, and my wife is certainly lobbying for this option because then she'll get my 13" Air.
On the other hand, I'd like to see what the new iMac will be like, and I really like the Air. I don't rely on complicated photo editing, I just adjust a few things in the raw converter and sharpen it for the desired medium, so I don't need a super-powerful machine for anything other than the panoramas. I do need a mouse and a big IPS screen when I work with the photos, though, so I really need at least some parts of a desktop system.