So apple launched it, its beautifully thin and in many ways very nice. However my apple lust has been subdued by the following.
The 1.8 inch Hard Drive is likely to be extremely slow and given my experience with closely related iPod hard drives not designed for long continuos operation.
That leaves the SSD model which is over $3000.
No user replaceable battery. One of the main reasons I want an ultraportable is for travel where battery life is critica. 5 theoretical hours is a good start but, for a transatlantic flight nowhere near enough. Thats where a spare battery comes in.
Those design decisions which allowed them to build a beautifully slim laptop ultimately prevent me from buying it. I would have taken a little bit thicker with a 2.5'' drive and a replaceable battery any day. It's nice to have ultimates, like worlds thinnest, but for real day to day practical use, I will take a couple of compromises.