I hate it. The resolution seems unnatural on the 11" MBA. The biggest problem is the bezel itself. It just looks weird. The next problem is I feel like it has lost height and I am losing part of the screen.
Now, I love the 27" LED ACD, but it's so big that it doesn't matter that it is 16x9 as I am usually using two pages side by side. On the 11" MBA it doesn't fit two pages across, and it's missing the bottom of web pages and etc.
I love the 13" MBA not just for 16x10 but also for the great resolution. I would recommend anyone thoroughly test the apps they will commonly use before buying an 11" MBA. However, that being said, with my 27" ACD, I feel like the MBA is still plenty capable as a primary Mac. It is ultraportable and yet turns into an instant desktop.
I cannot wait until they all have Thunderbolt and the ACDs have FW, USB 3.0, and etc without any need for the ports on the Macs as Thunderbolt can do it all. The next ACDs will feel even more like docking stations than current and will require one small Thunderbolt connection for all capabilities.