And what's the use of it when Apple already offers the MBs and the iPad? In my view the MBA is a cool machine, but doesn't justify itself in today's market segments. Its only chance of success is if it's priced low enough to finish netbooks once and for all...otherwise it's gonna be just another Cube.
I would use it. So would my wife.
I have 13" MBP right now and while I love it, I'd be happier with a machine that lacked an optical drive entirely.
An 11.6" MBA is gonna run cooler, run quieter (not that this machine is particularly hot or loud, but can be), be smaller, hopefully run "real" OS X, have a keyboard and a trackpad and get WAY better battery life. Plus, the speed to the average joe is going to be perceptibly fast because it's running with an SSD.
I'm VERY curious to see this machine and its specs. As a developer I really don't need a lot of power. I traded in my 15" MBP for the latest 13" because I prefer the form factor. I used to have a 12" PowerBook too. I really like small form factors on the road and when working at home or at the office, I hook up to an external keyboard, mouse and monitor.
11.6" might be a little too small... but I dunno. I'll have to see it. If this thing has a variant with at least 100 GB of space, I'll consider it. I mean, I'm gonna have to see it, but this is the most interesting thing coming from Apple, from my perspective, in a while.
I wonder what they're gonna use for video, processor and chipset. The 20th can't come soon enough!