You betcha -- the MBA is my first Mac. It's an upgraded netbook for me. I've used a Dell Mini 9 for nearly 2 years and have loved, LOVED that computer. I adore the fast boot (SSD-based), zippy program launch, light weight, and form factor small enough to live in my purse.
The MBA is an almost perfect upgrade for me. A full-size keyboard (my only real complaint with the dell mini -- but I adjusted), faster overall machine, bigger SSD, bigger screen, way thinner and all for the same weight as my mini 9. The only thing that's going to be hard to give up is the replaceable batteries. My mini never leaves my purse when I come home. I just swap out batteries on my at-home battery charger. I always have fully charged batteries and never have to worry about running out of power on the road, forgetting to charge the mini when I get home, or forgetting to retrieve the mini off the charger and put it back in my purse. This will all happen with the MBA, I know. Sigh. But it is so much sexier.
Yes, the 11.6 inch MBA is absolutely my new NETBOOK.