It could be any day now really. The new processors are already rolled out, and they are in the MBAs. If the Air is a consideration for you, I always recommend it because it will more than likely satisfy your needs.
The resolution on the Air is actually the equivalent of the 15" MBP (non-retina). The Air has always been the top of the line when it came to screen and resolution. It is only topped by the rmbps.
The new Airs can play most games at decent resolution, and it runs apps like Lightroom and Aperture like a charm. Plus the battery life is ridiculous. Being mobile without worrying about a charge is great. They are also cheaper than the rmbps.
I got a 13" rmbp, but the graphics card is underpowered for that screen, and it was expensive for what I got. I kept it for almost a month but gave up and just got what I thought I really wanted, which was a 15" rmbp. I kept that for about 7-8 months and it was the best laptop I have ever owned. It was expensive, and overkill for what I needed. I sold it and grabbed an Air. It does the tasks like photo editing in Lightroom that I was doing on the rmbp. This laptop is perfect.