Well, its Chrome OS, so anything that runs on Chrome browser anywhere (including Native Client apps), plus additional apps using the Chrome OS-specific APIs.
> Chrome OS wasn't a touch based OS as far as I recall... have they integrated touch into the OS now?
Chrome browser (and, therefore, Chrome OS) has been integrating touch features for several versions. Since I don't use Chrome on touch devices (except Chrome on iOS, which is a different beast) I'm not that familiar with it, but my understanding was that the support was pretty far along by now.
Yes, the OS itself is touch enabled. Buttons and such are better designed for tapping, tabs are draggable, the status bar at the bottom can be pulled up with a swipe, etc.
