I agree though that I probably wouldn't buy this for development work. But I do think that browser's are still better on beefy hardware than on gimped hardware.
Really? If you're the one person in the world doing heavy WebGL this might be the product for you.
I do agree that $1300 is too much, at that price range you might as well get a mac. If it was 600-800 i'd probably jump on it. However, I think the curve ball here is the touch screen. I'd be willing to bet that Google's strategy for this laptop is to do a smaller production run, and get these in the hands of tech/programmer types, and then use the lessons learned to develop a model targeted toward a wider audience.
If that's the case, pull an Apple and ship great dev tools on the installation disk. As far as I can tell, there are no top-notch Chrome OS development tools, just various ways to remote into a real machine to do that work.
Now, you'd never write code in the Chrome Developer Tools (except maybe the occasional one-liner in the REPL). But the Chrome Developer Tools are great — best in class even — for profiling, visualizing, and debugging.