> It doesn't matter how they are delivered, if they install and run locally then they're installed and run locally, and if they're run from chrome then they're in chrome.
But then how do you distinguish this from regular web apps/pages? Perhaps your use of the word 'install' is your key, but these NaCl apps are no more or less installed then an advanced web apps: they can be cached in the browser, or even pre-cached, but they are still not a component of the OS or of the browser.
Come to think of it, I'm using Firefox and I have a bunch of add-ons 'installed' in my browser, so I guess the term 'install' is already used for web-apps. Now I'm getting lost in terminology.
> It could be delivered to them just as easily, but would it run on them? Chrome on Chromebooks is different from Chrome on PCs is different from Chrome on Android.
Yes. The Chrome browser has supported NaCl for a while. It is mostly used for games.