I'll believe the 9 hours when I see it.
The Macbook Air has a Core 2 Duo processor in it that runs considerably faster than the one in the Tosh
How is it "better"?
The 1.6 GHz cpu is great for marketing purposes, but due to the heat in the MBA, the cpu has to be scaled down to run at 1.2 GHz most of the time. The Toshiba is probably just as fast in real-world use, despite the numbers you see on the spec sheet.
Anyway, from what I hear, the R500 wasn't very well built, so bleh! Sure, it was just 0.2" thicker than the MBA or something (i.e. nearly the same) and still had a DVD burner, but the TZ and Lenovo X series were supposedly built far better (but lacked the optical drive).
The only thing with the new Sony TT, which has an optical drive (even a Blu-Ray option), is that nobody has heard much about its battery life, and it isn't being advertised. I expect it to be crap.
Anyway, the MBA is useful enough for most people, and beautiful as well. I just wish Apple surprises everyone and introduces a 12" version soon, because with the new thin aluminium MacBooks on the horizon for far less than the MBA, there won't be much incentive to buy a 13.3" MBA anymore when the MacBooks appear to be thinner than 1" as well, and will have an optical drive.