http://www.theverge.com/2013/2/21/4013480/google-chromebook-...
It looks an awful lot like a Macbook: Just witness the aluminum-like color and the black bevel around the screen. Where it looks different, it's uglier. The hinge looks particularly bad. And judging by the pictures it's an awful lot bulkier than a Macbook Air.
Chrome OS strikes me as an underpowered OS. That is, there's a lot it won't do and it seems mostly suitable for underpowered machines.
UPDATE: this paragraph is wrong; I stand corrected! -- The ChromeBook Pixel has a 4:3 display. Now, I recently came across an old laptop of mine that had a 4:3 display and it looked off. I'm not saying that 4:3 aspect ratio a bad choice in an objective sense, but it strikes me as a bad choice from a marketing point of view.
For one hundred dollars less you can get a 13" Macbook Air. For two hundred dollars more you can get a 13" Macbook Pro with Retina Display. Both these machines seem better than the Chromebook Pixel in every way, including battery life (7 hours versus 5).
In conclusion, I think this is going to fail badly.