It if were $600. If it had Gigabit ethernet, or even Firewire with a firewire/ethernet dongle. If it had a dock ... If did Bluetooth tethering to an iPhone... Built in GSM support ...
But it has none of the above.
Ok, what if the designers were gambling on USB 3.0?
Universal Serial Bus - Wikipedia, the free encyclopediaA future Air Book with USB 3.0, and a USB 3.0 to ethernet dongle, and a USB 3.0 docking station -- that could make sense.
.... On September 18, 2007, Pat Gelsinger demonstrated USB 3.0 at the fall Intel Developer Forum. USB 3.0 is targeted at ten times the current bandwidth, roughly 4.8 Gbit/s, utilizing a parallel optical cable. The USB 3.0 specification is planned to be released in the first half of 2008, commercial products are expected to arrive in 2009 or 2010.
* Backwards-Compatibility and Efficiency: USB 3.0 is designed to be backwards-compatible with USB 2.0 and USB 1.1 and employs more efficient protocols to conserve power...
Maybe today's Air Book is a marker for that future.
Incidentally, I've been hoping for a 20% drop in Apple's share price to refocus them on delivering value to customers (viz the Airport Extreme disk story). I might get my wish faster than expected!