I was wondering if googles chrome os will lend it self to having JS frameworks for the desktop? Has this been discussed at all? I thought I had read that they were in fact building js driven apps for it.
but a RIA developed for current browsers would run in that environment as well, right (even if there is no "browser")?
Yes, there is a browser in Chrome OS, but the browser is a bit more than just a website viewer. It is the main/(possibly only) interface that applications can run in. Chrome is meant to be an OS where the applications run in the cloud (web apps). Chrome browser now is a lot like what you will see in Chrome OS.