[jimmyhwang]

I have a 15" MBP and I've played around with the 13" MBA and I will say that the real estate issue isn't noticeable. Unless you have difficultly in reading smaller icons and fonts, having the same resolution made very little difference to me.

I will also note that the keyboard feels better on the MBA and the weight is a SIZEABLE difference (~3lbs vs. 5.5lbs).

The downside of course is if for some reason you need better specs, the MBA is only an i5 and maxes out at 4GB of RAM.