As for me I prefer 1280x800.
1440x900, in a 13" screen and without a resolution independent OS is too small for me.
However what's great in a retina display is that you can use 1440x900 (if you wish) without an enormous degradation of image quality. I tried 1280x800 in an MBA and the result was horrendous.
Luckly I'm pretty optimistic that retina resolution will not be changed in the next update.
Disagree. 1440x900 should pretty much be standard in a 13-inch screen. Any larger would definitely be overkill.