In the US I have seen it only once: from people who got them free from Google I/O. But they still sell a lot of these devices. The target market are people who just need a browser or for schools.
Go read some sysadmin posts about Chromebooks, they are highly loved by schools. They are cheap, interchangeable between students with little issue (since it is all cloud based), and have great admin tools when you have a fleet of them.
The proof is the amount of ChromeOS devices one sees on sale here in Germany. Almost zero and the ones that do sell, tend to get discounted almost all the way to zero before anyone buys them, just to replace ChromeOS with a standard GNU/Linux distribution.
As for Oracle's suing them, Google should have played by the rules all JVM vendors follow instead of playing dirty on Sun.