I have a Sony Vaio Z. It weighs less than the corresponding 13" Macbook Air (carbon fiber! Like a Ferrari!), has better specs and an innovative design. For one, it does not look like an Air--it does not taper to a point, which is something that annoys me in both the Asus and the Air. It has an actually minimalistic design and looks gorgeous in black.
However, the real innovation is in the "Power Media Dock" which--despite the silly marketing name--is actually a brilliant piece of hardware. The laptop itself does not have a DVD drive and uses an Intel HD 3000 graphics chipset. However, it comes with a dock using Intel's LightPeak protocol that contains a discrete ATI graphics card and DVD drive. This lets you have a meaty graphics card at home and a mobile one on the go--very useful. I can also plug my extra monitor and various peripherals into it so that I only need to plug one thing into my laptop when I come home.
There are a couple of problems: the keyboard is "not brilliant" at best, although I've gotten used to it. I've tried the Air's keyboard and, while it was better, it was also not brilliant. Additionally, the Linux support on the laptop is spotty. However, from what I've heard, this is also true of MacBooks, so it isn't a differentiating factor.
The last issue, of course, is the cost--it is closest to a 15" MacBook pro rather than the Air. However, for this, you get specs equal to a MacBook pro--including either a 1600x900 or 1920x1080 resolution. Even the lower-resolution screen--the one I have--looks fantastic.
Overall, the Vaio Z is exactly what the poster is deriding the Asus for not being--innovative, capable and well-built. It is "radically better" than an Air and the only really significant downside is that it's correspondingly more expensive. It even has a rather good touchpad. Oh, and raid-0 ssds. Oh yeah. I do not regret splurging on it at all.