Not talking about this specifically, but the model:<p>If an app only deals with local data, does it need to be a web app?, except that thereby it becomes zero-install, zero-update, global and cross-platform.<p>Could or is ChromeOS going to play local mp3s before? It's not much of an OS if it can only play mp3s on a server somewhere, with a browser plugin. Will Spotify and other streaming clients work on it? Is it cloud data only?