Proper tool for the job
As always, a Mac/Pc (Technically a Mac is a Personal Computer, but I digress) flame war ensues. I would never choose this device for work. It is a very niche device for a specific market segment. For the person whom stated..
"God bless the PC idiots who 'need' an RJ45 and a thousand USB slots (more isn't always better but it's always MORE, right?) and are clearly labouring in denial of a world where networks went wireless for the rest of us years ago."
You obviously have no profesional telecomunications or networking experience, nor have you worked with networked multimedia content creation, be it video or multichannel audio. Your "PC idiots" statement places you in a category of user that is limited by brand as opposed to functionality or useability.
The core of what this discussion should be is whether or not this is inovative. It is not. There have been ultraportable general purpose computers since the 80s for christ's sake. Texas instruments was putting out oversized calculators that were C/Basic capable with wide but short LCD displays. They had one on an episode of V back in the day. That stated, the Air is overpriced when looking at comprehensive functionality but about par the coarse for the UMPC market. It is only slightly more functional than my XV6700 phone.
I'll finnish by saying this device does not meet my personal requirements, but I'm sure that many Mac fanatics and other entertainment device consumers will embrace it. Enjoy it and keep your ignorant smugness to yourself.
P.S I use PCs, Macs, Linux, Solaris and HPUX systems daily. They are tools.